chore(package): update eslint to version 4.1.1

Closes #824

Author: greenkeeper[bot]

package.json

@@ -68,7 +68,7 @@
     "coveralls": "^2.13.1",
     "cz-conventional-changelog": "2.0.0",
     "documentation-schema": "0.0.1",
-    "eslint": "^3.19.0",
+    "eslint": "^4.1.1",
     "eslint-config-prettier": "^2.1.1",
     "eslint-plugin-flowtype": "^2.32.1",
     "flow-bin": "^0.46.0",