Fixed peerDependency issue when vue-loader@8.5.2 wants vue-hot-reload-api@^1.2.0

frontend/package.json

@@ -21,7 +21,7 @@
     "eslint-loader": "^1.5.0",
     "node-sass": "^3.9.3",
     "sass-loader": "^4.0.2",
-    "vue-hot-reload-api": "^2.0.6",
+    "vue-hot-reload-api": "^1.3.3",
     "vue-html-loader": "^1.2.3",
     "vue-loader": "^8.5.2",
     "vue-style-loader": "^1.0.0",