chore(package): update eslint-watch to version 4.0.2

Closes #43

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
     "css-loader": "^0.28.0",
     "eslint": "^3.19.0",
     "eslint-plugin-import": "^2.2.0",
-    "eslint-watch": "^3.0.1",
+    "eslint-watch": "^4.0.2",
     "express": "4.15.2",
     "extract-text-webpack-plugin": "^2.1.0",
     "html-webpack-plugin": "^2.28.0",