chore(package): update eslint to version 5.14.1

Closes #250

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "babel-polyfill": "^6.16.0",
     "babel-preset-es2015": "^6.16.0",
     "babel-register": "^6.7.2",
-    "eslint": "^4.7.0",
+    "eslint": "^5.14.1",
     "eslint-config-airbnb-base": "^12.0.0",
     "eslint-config-prettier": "^2.9.0",
     "eslint-import-resolver-node": "^0.3.0",