Upgrade to vue-cli v4.0.5

Author: rtucek

babel.config.js

@@ -1,5 +1,5 @@
 module.exports = {
   presets: [
-    '@vue/app',
+    '@vue/cli-plugin-babel/preset',
   ],
 };

package.json

@@ -8,16 +8,16 @@
     "lint": "vue-cli-service lint"
   },
   "dependencies": {
-    "core-js": "^2.6.5",
+    "core-js": "^3.3.2",
     "vue": "^2.6.10",
     "vue-class-component": "^7.0.2",
     "vue-property-decorator": "^8.1.0"
   },
   "devDependencies": {
-    "@vue/cli-plugin-babel": "^3.7.0",
-    "@vue/cli-plugin-eslint": "^3.7.0",
-    "@vue/cli-plugin-typescript": "^3.7.0",
-    "@vue/cli-service": "^3.7.0",
+    "@vue/cli-plugin-babel": "^4.0.5",
+    "@vue/cli-plugin-eslint": "^4.0.5",
+    "@vue/cli-plugin-typescript": "^4.0.5",
+    "@vue/cli-service": "^4.0.5",
     "@vue/eslint-config-airbnb": "^4.0.0",
     "@vue/eslint-config-typescript": "^4.0.0",
     "babel-eslint": "^10.0.1",