fix(vue): Add vue back as a dev dependency

Author: Danktuary

packages/vue/package.json

@@ -45,6 +45,7 @@
     "babel-loader": "^8.2.2",
     "eslint-plugin-vue": "^7.6.0",
     "typescript": "^4.1.3",
+    "vue": "^3.0.6",
     "vite": "^2.0.1",
     "vue-loader": "^16.1.2"
   },