Update dependency rollup to v1.20.3

Author: renovate-bot

package.json

@@ -26,7 +26,7 @@
     "postcss-cli": "6.1.2",
     "postcss-preset-env": "6.6.0",
     "prettier": "1.17.0",
-    "rollup": "1.15.2",
+    "rollup": "1.20.3",
     "rollup-plugin-node-resolve": "4.2.4",
     "serve": "11.0.0"
   }

yarn.lock

@@ -800,10 +800,10 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-12.0.2.tgz#3452a24edf9fea138b48fad4a0a028a683da1e40"
   integrity sha512-5tabW/i+9mhrfEOUcLDu2xBPsHJ+X5Orqy9FKpale3SjDA17j5AEpYq5vfy3oAeAHGcvANRCO3NV3d2D6q3NiA==
 
-"@types/node@^12.0.8":
-  version "12.0.8"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.0.8.tgz#551466be11b2adc3f3d47156758f610bd9f6b1d8"
-  integrity sha512-b8bbUOTwzIY3V5vDTY1fIJ+ePKDUBqt2hC2woVGotdQQhG/2Sh62HOKHrT7ab+VerXAcPyAiTEipPu/FsreUtg==
+"@types/node@^12.7.2":
+  version "12.7.4"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-12.7.4.tgz#64db61e0359eb5a8d99b55e05c729f130a678b04"
+  integrity sha512-W0+n1Y+gK/8G2P/piTkBBN38Qc5Q1ZSO6B5H3QmPCUewaiXOo2GCAWZ4ElZCcNhjJuBSUSLGFUJnmlCn5+nxOQ==
 
 "@types/q@^1.5.1":
   version "1.5.1"
@@ -835,10 +835,10 @@ accepts@~1.3.5:
     mime-types "~2.1.18"
     negotiator "0.6.1"
 
-acorn@^6.1.1:
-  version "6.1.1"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.1.1.tgz#7d25ae05bb8ad1f9b699108e1094ecd7884adc1f"
-  integrity sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==
+acorn@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-7.0.0.tgz#26b8d1cd9a9b700350b71c0905546f64d1284e7a"
+  integrity sha512-PaF/MduxijYYt7unVGRuds1vBC9bFxbNf+VWqhOClfdgy7RlVkQqt610ig1/yxTgsDIfW1cWDel5EBbOy3jdtQ==
 
 [email protected]:
   version "6.5.3"
@@ -4317,14 +4317,14 @@ [email protected]:
     is-module "^1.0.0"
     resolve "^1.10.0"
 
-rollup@1.15.2:
-  version "1.15.2"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.15.2.tgz#676feb0e73c8f99f75e0078b331a576c56354df6"
-  integrity sha512-NsH0Mjqk/RtlhSIJopNUiCYi3r3zudHxg9Cj6Or96QnJw/suab0/PjL50/GRNE5omvXEG2F9K4a334ddvA1Txg==
+rollup@1.20.3:
+  version "1.20.3"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-1.20.3.tgz#6243f6c118ca05f56b2d9433112400cd834a1eb8"
+  integrity sha512-/OMCkY0c6E8tleeVm4vQVDz24CkVgvueK3r8zTYu2AQNpjrcaPwO9hE+pWj5LTFrvvkaxt4MYIp2zha4y0lRvg==
   dependencies:
     "@types/estree" "0.0.39"
-    "@types/node" "^12.0.8"
-    acorn "^6.1.1"
+    "@types/node" "^12.7.2"
+    acorn "^7.0.0"
 
 [email protected], safe-buffer@^5.0.1, safe-buffer@^5.1.2, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"