chore: Setup lint-staged with husky(pre-commit) (#914)

Author: sudo-suhas

package.json

@@ -23,11 +23,23 @@
   },
   "homepage": "https://github.com/vuejs/vue-loader",
   "scripts": {
-    "lint": "eslint lib",
+    "lint": "eslint lib test",
+    "lint:fix": "eslint lib test --fix",
+    "precommit": "lint-staged",
     "test": "eslint lib && mocha --slow 5000 --timeout 10000",
     "docs": "cd docs && gitbook serve",
     "docs:deploy": "bash ./docs/deploy.sh"
   },
+  "lint-staged": {
+    "lib/**/*.js": [
+      "eslint --fix",
+      "git add"
+    ],
+    "test/**/*.js": [
+      "eslint --fix",
+      "git add"
+    ]
+  },
   "dependencies": {
     "consolidate": "^0.14.0",
     "hash-sum": "^1.0.2",
@@ -60,9 +72,11 @@
     "expose-loader": "^0.7.1",
     "extract-text-webpack-plugin": "^3.0.0",
     "file-loader": "^0.11.2",
+    "husky": "^0.14.3",
     "inject-loader": "^3.0.0",
     "js-yaml": "^3.9.0",
     "jsdom": "^9.2.1",
+    "lint-staged": "^4.0.2",
     "marked": "^0.3.6",
     "memory-fs": "^0.4.1",
     "mkdirp": "^0.5.1",