chore(package): update eslint to version 4.3.0

Closes #159

Author: greenkeeper[bot]

package.json

@@ -25,7 +25,7 @@
   "devDependencies": {
     "babel-eslint": "7.2.3",
     "coveralls": "2.13.1",
-    "eslint": "^3.17.0",
+    "eslint": "^4.3.0",
     "eslint-config-airbnb": "15.0.0",
     "eslint-plugin-import": "^2.0.0",
     "eslint-plugin-jsx-a11y": "5.1.0",