lint: add --fix flag to automatic fix linting issue (#6644)

* lint: add --fix flag to automatic fix linting issue

* add dedicated lint script

Author: shivarm

package.json

@@ -91,6 +91,7 @@
   ],
   "scripts": {
     "lint": "eslint .",
+    "lint:fix": "eslint . --fix",
     "test": "mocha --require test/support/env --reporter spec --check-leaks test/ test/acceptance/",
     "test-ci": "nyc --exclude examples --exclude test --exclude benchmarks --reporter=lcovonly --reporter=text npm test",
     "test-cov": "nyc --exclude examples --exclude test --exclude benchmarks --reporter=html --reporter=text npm test",