chore(package): update eslint to version 5.0.1

Closes #261

Author: greenkeeper[bot]

package.json

@@ -39,7 +39,7 @@
     "chai": "^4.1.2",
     "chai-as-promised": "^7.1.1",
     "delay": "^3.0.0",
-    "eslint": "^4.15.0",
+    "eslint": "^5.0.1",
     "eslint-config-airbnb-base": "^13.0.0",
     "eslint-plugin-import": "^2.8.0",
     "is-builtin-module": "^2.0.0",