chore(package): update @vue/cli-plugin-babel to version 4.3.1

Closes #16

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
   "devDependencies": {
     "@babel/plugin-proposal-export-default-from": "^7.2.0",
     "@semantic-release/git": "github:semantic-release/git",
-    "@vue/cli-plugin-babel": "^3.8.0",
+    "@vue/cli-plugin-babel": "^4.3.1",
     "@vue/cli-plugin-eslint": "^3.8.0",
     "@vue/cli-service": "^3.8.0",
     "@vue/eslint-config-airbnb": "^4.0.0",