chore(package): update eslint to version 6.3.0

Closes #67

Author: greenkeeper[bot]

package.json

@@ -73,7 +73,7 @@
     "body-parser": "^1.18.2",
     "chai": "4.1.2",
     "coveralls": "^3.0.0",
-    "eslint": "5.0.1",
+    "eslint": "6.3.0",
     "eslint-loader": "2.1.0",
     "feathers": "^2.2.4",
     "feathers-errors": "^2.9.2",