add lint command

Author: nygardk

package.json

@@ -5,6 +5,7 @@
   "main": "./lib/redux-autoloader.js",
   "scripts": {
     "build": "webpack -p --config webpack.config.js --progress --colors",
+    "lint": "eslint ./src",
     "test": "jest",
     "test:watch": "jest --watchAll",
     "demo": "webpack-dev-server --config webpack.demo.config.js --content-base demo/",