fix eslint plugin dep

Author: yyx990803

package.json

@@ -56,6 +56,7 @@
     "css-loader": "^0.23.1",
     "eslint": "^2.9.0",
     "eslint-config-vue": "^1.0.0",
+    "eslint-plugin-html": "^1.5.2",
     "expose-loader": "^0.7.1",
     "extract-text-webpack-plugin": "^1.0.1",
     "file-loader": "^0.8.5",