chore(package): update eslint to version 5.13.0

Closes #34

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "babel-preset-airbnb": "^2.4.0",
     "babel-register": "^6.26.0",
     "chai": "^4.1.2",
-    "eslint": "^4.10.0",
+    "eslint": "^5.13.0",
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-plugin-import": "^2.8.0",
     "in-publish": "^2.0.0",