chore(deps): fix deps

Author: christianalfoni

package.json

@@ -107,7 +107,8 @@
     "vue-template-compiler": "2.5.16",
     "webpack": "4.28.4",
     "webpack-cli": "3.1.2",
-    "webpack-dev-server": "3.1.11"
+    "webpack-dev-server": "3.1.11",
+    "@babel/plugin-proposal-class-properties": "7.3.4"
   },
   "lint-staged": {
     "*.{js,ts,tsx}": [