chore(package): update eslint to version 5.14.0

Closes #10

Author: greenkeeper[bot]

package.json

@@ -33,7 +33,7 @@
   "devDependencies": {
     "ava": "^0.25.0",
     "babel-eslint": "^8.0.0",
-    "eslint": "^4.7.2",
+    "eslint": "^5.14.0",
     "prettier": "^1.7.0"
   },
   "eslintConfig": {