diff --git a/package-lock.json b/package-lock.json
index 5e62c78..0698abb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-vega",
-  "version": "1.0.0-alpha.13",
+  "version": "1.0.0-alpha.14",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -19,10 +19,15 @@
         "@types/babel-types": "*"
       }
     },
-    "@types/json-stable-stringify": {
-      "version": "1.0.32",
-      "resolved": "https://registry.npmjs.org/@types/json-stable-stringify/-/json-stable-stringify-1.0.32.tgz",
-      "integrity": "sha512-q9Q6+eUEGwQkv4Sbst3J4PNgDOvpuVuKj79Hl/qnmBMEIPzB5QoFRUtjcgcg2xNUZyYUGXBk5wYIBKHt0A+Mxw=="
+    "@types/clone": {
+      "version": "0.1.30",
+      "resolved": "https://registry.npmjs.org/@types/clone/-/clone-0.1.30.tgz",
+      "integrity": "sha1-5zZWSMG0ITalnH1QQGN7O1yDthQ="
+    },
+    "@types/fast-json-stable-stringify": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/@types/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz",
+      "integrity": "sha512-mky/O83TXmGY39P1H9YbUpjV6l6voRYlufqfFCvel8l1phuy8HRjdWc1rrPuN53ITBJlbyMSV6z3niOySO5pgQ=="
     },
     "abbrev": {
       "version": "1.1.1",
@@ -2320,6 +2325,7 @@
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
       "integrity": "sha1-6L0O/uWPz/b4+UUQoKVUu/ojVEk=",
+      "dev": true,
       "requires": {
         "lru-cache": "^4.0.1",
         "shebang-command": "^1.2.0",
@@ -3078,6 +3084,11 @@
         "minimalistic-crypto-utils": "^1.0.0"
       }
     },
+    "emoji-regex": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-7.0.3.tgz",
+      "integrity": "sha512-CwBLREIQ7LvYFB0WyRvwhq5N5qPhc6PMjD6bYggFlI5YyDgl+0vxq5VHbMOFqLg7hfWzmu8T5Z1QofhmTIhItA=="
+    },
     "emojis-list": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/emojis-list/-/emojis-list-2.1.0.tgz",
@@ -3094,7 +3105,6 @@
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
       "integrity": "sha512-1MkrZNvWTKCaigbn+W15elq2BB/L22nqrSY5DKlo3X6+vclJm8Bb5djXJBmEX6fS3+zCh/F4VBK5Z2KxJt4s2Q==",
-      "dev": true,
       "requires": {
         "once": "^1.4.0"
       }
@@ -3603,17 +3613,31 @@
       }
     },
     "execa": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/execa/-/execa-0.7.0.tgz",
-      "integrity": "sha1-lEvs00zEHuMqY6n68nrVpl/Fl3c=",
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/execa/-/execa-1.0.0.tgz",
+      "integrity": "sha512-adbxcyWV46qiHyvSp50TKt05tB4tK3HcmF7/nxfAdhnox83seTDbwnaqKO4sXRy7roHAIFqJP/Rw/AuEbX61LA==",
       "requires": {
-        "cross-spawn": "^5.0.1",
-        "get-stream": "^3.0.0",
+        "cross-spawn": "^6.0.0",
+        "get-stream": "^4.0.0",
         "is-stream": "^1.1.0",
         "npm-run-path": "^2.0.0",
         "p-finally": "^1.0.0",
         "signal-exit": "^3.0.0",
         "strip-eof": "^1.0.0"
+      },
+      "dependencies": {
+        "cross-spawn": {
+          "version": "6.0.5",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
+          "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
+          "requires": {
+            "nice-try": "^1.0.4",
+            "path-key": "^2.0.1",
+            "semver": "^5.5.0",
+            "shebang-command": "^1.2.0",
+            "which": "^1.2.9"
+          }
+        }
       }
     },
     "exit-hook": {
@@ -3908,8 +3932,7 @@
     "fast-json-stable-stringify": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/fast-json-stable-stringify/-/fast-json-stable-stringify-2.0.0.tgz",
-      "integrity": "sha1-1RQsDK7msRifh9OnYREGT4bIu/I=",
-      "dev": true
+      "integrity": "sha1-1RQsDK7msRifh9OnYREGT4bIu/I="
     },
     "fast-levenshtein": {
       "version": "2.0.6",
@@ -4322,6 +4345,7 @@
           "version": "0.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "inherits": "2.0.3"
           }
@@ -4346,7 +4370,8 @@
         "buffer-shims": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "caseless": {
           "version": "0.12.0",
@@ -4363,7 +4388,8 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "combined-stream": {
           "version": "1.0.5",
@@ -4382,17 +4408,20 @@
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "cryptiles": {
           "version": "2.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "boom": "2.10.1"
           }
@@ -4465,7 +4494,8 @@
         "extsprintf": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "forever-agent": {
           "version": "0.6.1",
@@ -4588,6 +4618,7 @@
           "version": "3.1.3",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "boom": "2.x.x",
             "cryptiles": "2.x.x",
@@ -4635,6 +4666,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "1.0.1"
           }
@@ -4648,7 +4680,8 @@
         "isarray": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "isstream": {
           "version": "0.1.2",
@@ -4863,7 +4896,8 @@
         "process-nextick-args": {
           "version": "1.0.7",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "punycode": {
           "version": "1.4.1",
@@ -4901,6 +4935,7 @@
           "version": "2.2.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "buffer-shims": "~1.0.0",
             "core-util-is": "~1.0.0",
@@ -4952,7 +4987,8 @@
         "safe-buffer": {
           "version": "5.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "semver": {
           "version": "5.3.0",
@@ -4976,6 +5012,7 @@
           "version": "1.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "hoek": "2.x.x"
           }
@@ -5009,6 +5046,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -5019,6 +5057,7 @@
           "version": "1.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.0.1"
           }
@@ -5047,6 +5086,7 @@
           "version": "2.2.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "block-stream": "*",
             "fstream": "^1.0.2",
@@ -5102,7 +5142,8 @@
         "util-deprecate": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "uuid": {
           "version": "3.0.1",
@@ -5204,9 +5245,23 @@
       "dev": true
     },
     "get-stream": {
-      "version": "3.0.0",
-      "resolved": "http://registry.npmjs.org/get-stream/-/get-stream-3.0.0.tgz",
-      "integrity": "sha1-jpQ9E1jcN1VQVOy+LtsFqhdO3hQ="
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-4.1.0.tgz",
+      "integrity": "sha512-GMat4EJ5161kIy2HevLlr4luNjBgvmj413KaQA7jt4V8B4RDsfpHk7WQ9GVqfYyyx8OS/L66Kox+rJRNklLK7w==",
+      "requires": {
+        "pump": "^3.0.0"
+      },
+      "dependencies": {
+        "pump": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/pump/-/pump-3.0.0.tgz",
+          "integrity": "sha512-LwZy+p3SFs1Pytd/jYct4wpv49HiYCqd9Rlc5ZVdk0V+8Yzv6jR5Blk3TRmPL1ft69TxP0IMZGJ+WPFU2BFhww==",
+          "requires": {
+            "end-of-stream": "^1.1.0",
+            "once": "^1.3.1"
+          }
+        }
+      }
     },
     "getpass": {
       "version": "0.1.7",
@@ -6305,10 +6360,16 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/json-stable-stringify/-/json-stable-stringify-1.0.1.tgz",
       "integrity": "sha1-mnWdOcXy/1A/1TAGRu1EX4jE+a8=",
+      "dev": true,
       "requires": {
         "jsonify": "~0.0.0"
       }
     },
+    "json-stringify-pretty-compact": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/json-stringify-pretty-compact/-/json-stringify-pretty-compact-2.0.0.tgz",
+      "integrity": "sha512-WRitRfs6BGq4q8gTgOy4ek7iPFXjbra0H3PmDLKm2xnZ+Gh1HUhiKGgCZkSPNULlP7mvfu6FV/mOLhCarspADQ=="
+    },
     "json-stringify-safe": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
@@ -6339,7 +6400,8 @@
     "jsonify": {
       "version": "0.0.0",
       "resolved": "https://registry.npmjs.org/jsonify/-/jsonify-0.0.0.tgz",
-      "integrity": "sha1-LHS27kHZPKUbe1qu6PUDYx0lKnM="
+      "integrity": "sha1-LHS27kHZPKUbe1qu6PUDYx0lKnM=",
+      "dev": true
     },
     "jsonpointer": {
       "version": "4.0.1",
@@ -6630,6 +6692,7 @@
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-2.0.0.tgz",
       "integrity": "sha1-K1aLJl7slExtnA3pw9u7ygNUzY4=",
+      "dev": true,
       "requires": {
         "p-locate": "^2.0.0",
         "path-exists": "^3.0.0"
@@ -6638,7 +6701,8 @@
         "path-exists": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
-          "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU="
+          "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU=",
+          "dev": true
         }
       }
     },
@@ -6891,6 +6955,7 @@
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.1.tgz",
       "integrity": "sha512-q4spe4KTfsAS1SUHLO0wz8Qiyf1+vMIAgpRYioFYDMNqKfHQbg+AVDH3i4fvpl71/P1L0dBl+fQi+P37UYf0ew==",
+      "dev": true,
       "requires": {
         "pseudomap": "^1.0.2",
         "yallist": "^2.1.2"
@@ -6919,6 +6984,14 @@
         }
       }
     },
+    "map-age-cleaner": {
+      "version": "0.1.3",
+      "resolved": "https://registry.npmjs.org/map-age-cleaner/-/map-age-cleaner-0.1.3.tgz",
+      "integrity": "sha512-bJzx6nMoP6PDLPBFmg7+xRKeFZvFboMrGlxmNj9ClvX53KrmvM5bXFXEWjbz4cz1AFn+jWJ9z/DJSz7hrs0w3w==",
+      "requires": {
+        "p-defer": "^1.0.0"
+      }
+    },
     "map-obj": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/map-obj/-/map-obj-1.0.1.tgz",
@@ -6979,11 +7052,20 @@
       "dev": true
     },
     "mem": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/mem/-/mem-1.1.0.tgz",
-      "integrity": "sha1-Xt1StIXKHZAP5kiVUFOZoN+kX3Y=",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/mem/-/mem-4.2.0.tgz",
+      "integrity": "sha512-5fJxa68urlY0Ir8ijatKa3eRz5lwXnRCTvo9+TbTGAuTFJOwpGcY0X05moBd0nW45965Njt4CDI2GFQoG8DvqA==",
       "requires": {
-        "mimic-fn": "^1.0.0"
+        "map-age-cleaner": "^0.1.1",
+        "mimic-fn": "^2.0.0",
+        "p-is-promise": "^2.0.0"
+      },
+      "dependencies": {
+        "mimic-fn": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-2.0.0.tgz",
+          "integrity": "sha512-jbex9Yd/3lmICXwYT6gA/j2mNQGU48wCh/VzRd+/Y/PjYQtlg1gLMdZqvu9s/xH7qKvngxRObl56XZR609IMbA=="
+        }
       }
     },
     "memory-fs": {
@@ -7089,7 +7171,8 @@
     "mimic-fn": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-1.2.0.tgz",
-      "integrity": "sha512-jf84uxzwiuiIVKiOLpfYk7N46TSy8ubTonmneY9vrpHNAnp0QBt2BxWV9dO3/j+BoVAb+a5G6YDPW3M5HOdMWQ=="
+      "integrity": "sha512-jf84uxzwiuiIVKiOLpfYk7N46TSy8ubTonmneY9vrpHNAnp0QBt2BxWV9dO3/j+BoVAb+a5G6YDPW3M5HOdMWQ==",
+      "dev": true
     },
     "minimalistic-assert": {
       "version": "1.0.0",
@@ -7120,6 +7203,7 @@
       "version": "2.3.5",
       "resolved": "https://registry.npmjs.org/minipass/-/minipass-2.3.5.tgz",
       "integrity": "sha512-Gi1W4k059gyRbyVUZQ4mEqLm0YIUiGYfvxhF6SIlk3ui1WVxMTGfGdQ2SInh3PDrRTVvPKgULkpJtT4RH10+VA==",
+      "optional": true,
       "requires": {
         "safe-buffer": "^5.1.2",
         "yallist": "^3.0.0"
@@ -7128,12 +7212,14 @@
         "safe-buffer": {
           "version": "5.1.2",
           "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
+          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
           "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
-          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
+          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A==",
+          "optional": true
         }
       }
     },
@@ -7338,6 +7424,11 @@
         "inherits": "~2.0.1"
       }
     },
+    "nice-try": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/nice-try/-/nice-try-1.0.5.tgz",
+      "integrity": "sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ=="
+    },
     "no-case": {
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/no-case/-/no-case-2.3.2.tgz",
@@ -8232,15 +8323,26 @@
         "object-assign": "^4.1.0"
       }
     },
+    "p-defer": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/p-defer/-/p-defer-1.0.0.tgz",
+      "integrity": "sha1-n26xgvbJqozXQwBKfU+WsZaw+ww="
+    },
     "p-finally": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/p-finally/-/p-finally-1.0.0.tgz",
       "integrity": "sha1-P7z7FbiZpEEjs0ttzBi3JDNqLK4="
     },
+    "p-is-promise": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/p-is-promise/-/p-is-promise-2.0.0.tgz",
+      "integrity": "sha512-pzQPhYMCAgLAKPWD2jC3Se9fEfrD9npNos0y150EeqZll7akhEgGhTW/slB6lHku8AvYGiJ+YJ5hfHKePPgFWg=="
+    },
     "p-limit": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-1.3.0.tgz",
       "integrity": "sha512-vvcXsLAJ9Dr5rQOPk7toZQZJApBl2K4J6dANSsEuh6QI41JYcsS/qhTGa9ErIUUgK3WNQoJYvylxvjqmiqEA9Q==",
+      "dev": true,
       "requires": {
         "p-try": "^1.0.0"
       }
@@ -8249,6 +8351,7 @@
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-2.0.0.tgz",
       "integrity": "sha1-IKAQOyIqcMj9OcwuWAaA893l7EM=",
+      "dev": true,
       "requires": {
         "p-limit": "^1.1.0"
       }
@@ -8256,7 +8359,8 @@
     "p-try": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/p-try/-/p-try-1.0.0.tgz",
-      "integrity": "sha1-y8ec26+P1CKOE/Yh8rGiN8GyB7M="
+      "integrity": "sha1-y8ec26+P1CKOE/Yh8rGiN8GyB7M=",
+      "dev": true
     },
     "pako": {
       "version": "1.0.6",
@@ -9173,7 +9277,8 @@
     "pseudomap": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
-      "integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM="
+      "integrity": "sha1-8FKijacOYYkX7wqKw0wa5aaChrM=",
+      "dev": true
     },
     "psl": {
       "version": "1.1.29",
@@ -10705,7 +10810,7 @@
     },
     "strip-eof": {
       "version": "1.0.0",
-      "resolved": "http://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
+      "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
       "integrity": "sha1-u0P/VZim6wXYm1n80SnJgzE2Br8="
     },
     "strip-indent": {
@@ -11450,17 +11555,22 @@
       }
     },
     "vega-lite": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/vega-lite/-/vega-lite-2.6.0.tgz",
-      "integrity": "sha512-m4TY1xVk2q9kmxpL0SR8WV8RTTsk7TRE9FXSiLuZ58TIuVjZ0CN2QCDg6rNYXtzURiokFOsqaFrzbxIQQLPsxg==",
-      "requires": {
-        "@types/json-stable-stringify": "^1.0.32",
-        "json-stable-stringify": "^1.0.1",
-        "tslib": "^1.9.2",
-        "vega-event-selector": "^2.0.0",
-        "vega-typings": "^0.3.17",
-        "vega-util": "^1.7.0",
-        "yargs": "^11.0.0"
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/vega-lite/-/vega-lite-3.0.0.tgz",
+      "integrity": "sha512-m6dxqB2Nc7uOms+d5EZRsPjmKHmcZIkBGNEC7BJ7X5P0zg53ZjauIEFf8/LqiTh/H8c68QC62wyt7kPkxZsG3g==",
+      "requires": {
+        "@types/clone": "~0.1.30",
+        "@types/fast-json-stable-stringify": "^2.0.0",
+        "clone": "~2.1.2",
+        "fast-deep-equal": "~2.0.1",
+        "fast-json-stable-stringify": "~2.0.0",
+        "json-stringify-pretty-compact": "~2.0.0",
+        "tslib": "~1.9.3",
+        "vega-event-selector": "~2.0.0",
+        "vega-expression": "~2.6.0",
+        "vega-typings": "0.6.2",
+        "vega-util": "~1.10.0",
+        "yargs": "~13.2.2"
       },
       "dependencies": {
         "ansi-regex": {
@@ -11469,9 +11579,9 @@
           "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg="
         },
         "camelcase": {
-          "version": "4.1.0",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
-          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0="
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.2.0.tgz",
+          "integrity": "sha512-IXFsBS2pC+X0j0N/GE7Dm7j3bsEBp+oTpb7F50dwEVX7rf3IgwO9XatnegTsDtniKCUtEJH4fSU6Asw7uoVLfQ=="
         },
         "cliui": {
           "version": "4.1.0",
@@ -11481,38 +11591,133 @@
             "string-width": "^2.1.1",
             "strip-ansi": "^4.0.0",
             "wrap-ansi": "^2.0.0"
+          },
+          "dependencies": {
+            "string-width": {
+              "version": "2.1.1",
+              "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
+              "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+              "requires": {
+                "is-fullwidth-code-point": "^2.0.0",
+                "strip-ansi": "^4.0.0"
+              }
+            }
           }
         },
+        "clone": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/clone/-/clone-2.1.2.tgz",
+          "integrity": "sha1-G39Ln1kfHo+DZwQBYANFoCiHQ18="
+        },
+        "fast-deep-equal": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-2.0.1.tgz",
+          "integrity": "sha1-ewUhjd+WZ79/Nwv3/bLLFf3Qqkk="
+        },
         "find-up": {
-          "version": "2.1.0",
-          "resolved": "https://registry.npmjs.org/find-up/-/find-up-2.1.0.tgz",
-          "integrity": "sha1-RdG35QbHF93UgndaK3eSCjwMV6c=",
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/find-up/-/find-up-3.0.0.tgz",
+          "integrity": "sha512-1yD6RmLI1XBfxugvORwlck6f75tYL+iR0jqwsOrOxMZyGYqUuDhJ0l4AXdO1iX/FTs9cBAMEk1gWSEx1kSbylg==",
           "requires": {
-            "locate-path": "^2.0.0"
+            "locate-path": "^3.0.0"
           }
         },
+        "get-caller-file": {
+          "version": "2.0.5",
+          "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
+          "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg=="
+        },
+        "invert-kv": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/invert-kv/-/invert-kv-2.0.0.tgz",
+          "integrity": "sha512-wPVv/y/QQ/Uiirj/vh3oP+1Ww+AWehmi1g5fFWGPF6IpCBCDVrhgHRMvrLfdYcwDh3QJbGXDW4JAuzxElLSqKA=="
+        },
         "is-fullwidth-code-point": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz",
           "integrity": "sha1-o7MKXE8ZkYMWeqq5O+764937ZU8="
         },
+        "lcid": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/lcid/-/lcid-2.0.0.tgz",
+          "integrity": "sha512-avPEb8P8EGnwXKClwsNUgryVjllcRqtMYa49NTsbQagYuT1DcXnl1915oxWjoyGrXR6zH/Y0Zc96xWsPcoDKeA==",
+          "requires": {
+            "invert-kv": "^2.0.0"
+          }
+        },
+        "locate-path": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/locate-path/-/locate-path-3.0.0.tgz",
+          "integrity": "sha512-7AO748wWnIhNqAuaty2ZWHkQHRSNfPVIsPIfwEOWO22AmaoVrWavlOcMR5nzTLNYvp36X220/maaRsrec1G65A==",
+          "requires": {
+            "p-locate": "^3.0.0",
+            "path-exists": "^3.0.0"
+          }
+        },
         "os-locale": {
-          "version": "2.1.0",
-          "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-2.1.0.tgz",
-          "integrity": "sha512-3sslG3zJbEYcaC4YVAvDorjGxc7tv6KVATnLPZONiljsUncvihe9BQoVCEs0RZ1kmf4Hk9OBqlZfJZWI4GanKA==",
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-3.1.0.tgz",
+          "integrity": "sha512-Z8l3R4wYWM40/52Z+S265okfFj8Kt2cC2MKY+xNi3kFs+XGI7WXu/I309QQQYbRW4ijiZ+yxs9pqEhJh0DqW3Q==",
           "requires": {
-            "execa": "^0.7.0",
-            "lcid": "^1.0.0",
-            "mem": "^1.1.0"
+            "execa": "^1.0.0",
+            "lcid": "^2.0.0",
+            "mem": "^4.0.0"
           }
         },
+        "p-limit": {
+          "version": "2.2.0",
+          "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-2.2.0.tgz",
+          "integrity": "sha512-pZbTJpoUsCzV48Mc9Nh51VbwO0X9cuPFE8gYwx9BTCt9SF8/b7Zljd2fVgOxhIF/HDTKgpVzs+GPhyKfjLLFRQ==",
+          "requires": {
+            "p-try": "^2.0.0"
+          }
+        },
+        "p-locate": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/p-locate/-/p-locate-3.0.0.tgz",
+          "integrity": "sha512-x+12w/To+4GFfgJhBEpiDcLozRJGegY+Ei7/z0tSLkMmxGZNybVMSfWj9aJn8Z5Fc7dBUNJOOVgPv2H7IwulSQ==",
+          "requires": {
+            "p-limit": "^2.0.0"
+          }
+        },
+        "p-try": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/p-try/-/p-try-2.1.0.tgz",
+          "integrity": "sha512-H2RyIJ7+A3rjkwKC2l5GGtU4H1vkxKCAGsWasNVd0Set+6i4znxbWy6/j16YDPJDWxhsgZiKAstMEP8wCdSpjA=="
+        },
+        "path-exists": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/path-exists/-/path-exists-3.0.0.tgz",
+          "integrity": "sha1-zg6+ql94yxiSXqfYENe1mwEP1RU="
+        },
+        "require-main-filename": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
+          "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg=="
+        },
         "string-width": {
-          "version": "2.1.1",
-          "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",
-          "integrity": "sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==",
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
+          "integrity": "sha512-vafcv6KjVZKSgz06oM/H6GDBrAtz8vdhQakGjFIvNrHA6y3HCF1CInLy+QLq8dTJPQ1b+KDUqDFctkdRW44e1w==",
           "requires": {
+            "emoji-regex": "^7.0.1",
             "is-fullwidth-code-point": "^2.0.0",
-            "strip-ansi": "^4.0.0"
+            "strip-ansi": "^5.1.0"
+          },
+          "dependencies": {
+            "ansi-regex": {
+              "version": "4.1.0",
+              "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-4.1.0.tgz",
+              "integrity": "sha512-1apePfXM1UOSqw0o9IiFAovVz9M5S1Dg+4TrDwfMewQ6p/rmMueb7tWZjQ1rx4Loy1ArBggoqGpfqqdI4rondg=="
+            },
+            "strip-ansi": {
+              "version": "5.2.0",
+              "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-5.2.0.tgz",
+              "integrity": "sha512-DuRs1gKbBqsMKIZlrffwlug8MHkcnpjs5VPmL1PAh+mA30U0DTotfDZ0d2UUsXpPmPmMMJ6W773MaA3J+lbiWA==",
+              "requires": {
+                "ansi-regex": "^4.1.0"
+              }
+            }
           }
         },
         "strip-ansi": {
@@ -11523,36 +11728,62 @@
             "ansi-regex": "^3.0.0"
           }
         },
+        "vega-expression": {
+          "version": "2.6.0",
+          "resolved": "https://registry.npmjs.org/vega-expression/-/vega-expression-2.6.0.tgz",
+          "integrity": "sha512-c2FFrIfKtlTtLCR3BnZDm6O2ey7u+5YRukLnNobRe+hoiqeH86C2+FkjXotE63cYGj39R5OS+SK+VBSDz3bmVw==",
+          "requires": {
+            "vega-util": "^1.8.0"
+          }
+        },
+        "vega-typings": {
+          "version": "0.6.2",
+          "resolved": "https://registry.npmjs.org/vega-typings/-/vega-typings-0.6.2.tgz",
+          "integrity": "sha512-k1VBtlj+Ls8cgl1zvdUD6iX7YGsxkHSWmeG0C8DGOxKU7Q3imOCb7uUytexVjVKuWqwCrMnmNTYspelgLBMO+Q==",
+          "requires": {
+            "vega-util": "^1.10.0"
+          }
+        },
+        "vega-util": {
+          "version": "1.10.0",
+          "resolved": "https://registry.npmjs.org/vega-util/-/vega-util-1.10.0.tgz",
+          "integrity": "sha512-fTGnTG7FhtTG9tiYDL3k5s8YHqB71Ml5+aC9B7eaBygeB8GKXBrcbTXLOzoCRxT3Jr5cRhr99PMBu0AkqmhBog=="
+        },
         "which-module": {
           "version": "2.0.0",
           "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.0.tgz",
           "integrity": "sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho="
         },
+        "y18n": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz",
+          "integrity": "sha512-r9S/ZyXu/Xu9q1tYlpsLIsa3EeLXXk0VwlxqTcFRfg9EhMW+17kbt9G0NrgCmhGb5vT2hyhJZLfDGx+7+5Uj/w=="
+        },
         "yargs": {
-          "version": "11.1.0",
-          "resolved": "http://registry.npmjs.org/yargs/-/yargs-11.1.0.tgz",
-          "integrity": "sha512-NwW69J42EsCSanF8kyn5upxvjp5ds+t3+udGBeTbFnERA+lF541DDpMawzo4z6W/QrzNM18D+BPMiOBibnFV5A==",
+          "version": "13.2.2",
+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.2.2.tgz",
+          "integrity": "sha512-WyEoxgyTD3w5XRpAQNYUB9ycVH/PQrToaTXdYXRdOXvEy1l19br+VJsc0vcO8PTGg5ro/l/GY7F/JMEBmI0BxA==",
           "requires": {
             "cliui": "^4.0.0",
-            "decamelize": "^1.1.1",
-            "find-up": "^2.1.0",
-            "get-caller-file": "^1.0.1",
-            "os-locale": "^2.0.0",
+            "find-up": "^3.0.0",
+            "get-caller-file": "^2.0.1",
+            "os-locale": "^3.1.0",
             "require-directory": "^2.1.1",
-            "require-main-filename": "^1.0.1",
+            "require-main-filename": "^2.0.0",
             "set-blocking": "^2.0.0",
-            "string-width": "^2.0.0",
+            "string-width": "^3.0.0",
             "which-module": "^2.0.0",
-            "y18n": "^3.2.1",
-            "yargs-parser": "^9.0.2"
+            "y18n": "^4.0.0",
+            "yargs-parser": "^13.0.0"
           }
         },
         "yargs-parser": {
-          "version": "9.0.2",
-          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-9.0.2.tgz",
-          "integrity": "sha1-nM9qQ0YP5O1Aqbto9I1DuKaMwHc=",
+          "version": "13.0.0",
+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.0.0.tgz",
+          "integrity": "sha512-w2LXjoL8oRdRQN+hOyppuXs+V/fVAYtpcrRxZuF7Kt/Oc+Jr2uAcVntaUTNT6w5ihoWfFDpNY8CPx1QskxZ/pw==",
           "requires": {
-            "camelcase": "^4.1.0"
+            "camelcase": "^5.0.0",
+            "decamelize": "^1.2.0"
           }
         }
       }
@@ -12278,7 +12509,8 @@
     "yallist": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI="
+      "integrity": "sha1-HBH5IY8HYImkfdUS+TxmmaaoHVI=",
+      "dev": true
     },
     "yargs": {
       "version": "7.1.0",
diff --git a/package.json b/package.json
index e9b0883..24f0f32 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   "dependencies": {
     "lodash-es": "^4.17.11",
     "vega": "^3.3.1",
-    "vega-lite": "^2.6.0",
+    "vega-lite": "^3.0.0",
     "vue": "^2.5.17"
   },
   "devDependencies": {