chore(package): update eslint to version 5.0.1

Closes #4

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
   "homepage": "https://github.com/opencomponents/oc-plugin-jwt#readme",
   "devDependencies": {
     "codecov": "3.0.0",
-    "eslint": "^4.18.1",
+    "eslint": "^5.0.1",
     "eslint-config-prettier": "^2.9.0",
     "eslint-plugin-prettier": "^2.6.0",
     "husky": "^0.14.3",