chore(package): update eslint to version 6.3.0

Closes #94

Author: greenkeeper[bot]

Diff for: package.json

@@ -46,7 +46,7 @@
     "uuid": "^3.2.1"
   },
   "devDependencies": {
-    "eslint": "5.0.1",
+    "eslint": "6.3.0",
     "eslint-config-standard": "11.0.0",
     "eslint-plugin-import": "2.12.0",
     "eslint-plugin-node": "6.0.1",