Bump babel and fix browser supports.

Author: oxalica

.babelrc

@@ -0,0 +1,10 @@
+// This config will overwrite that in node_modules.
+module.exports = {
+    presets: [
+        "@vue/babel-preset-app"
+    ],
+    plugins: [
+        "@babel/plugin-proposal-object-rest-spread",
+        "lodash"
+    ]
+}

babel.config.js

@@ -28,10 +28,12 @@
     "markdown-it-v-katex": "^1.0.0-alpha.1"
   },
   "devDependencies": {
-    "@vue/cli-plugin-babel": "^3.0.0-beta.15",
-    "@vue/cli-plugin-eslint": "^3.0.0-beta.15",
-    "@vue/cli-service": "^3.0.0-beta.15",
-    "@vue/eslint-config-standard": "^3.0.0-rc.3",
+    "@babel/plugin-proposal-object-rest-spread": "^7.0.0",
+    "@babel/preset-env": "^7.1.6",
+    "@vue/cli-plugin-babel": "^3.1.1",
+    "@vue/cli-plugin-eslint": "^3.1.5",
+    "@vue/cli-service": "^3.1.4",
+    "@vue/eslint-config-standard": "^4.0.0",
     "babel-plugin-lodash": "^3.3.4",
     "http-server": "^0.11.1",
     "stylus": "^0.54.5",

package.json

@@ -17,5 +17,8 @@ module.exports = {
             libraryExport: 'default'
         }
     },
+    transpileDependencies: [
+        /markdown-it-v/
+    ],
     productionSourceMap: false
 }