chore(package): update eslint to version 6.2.0

Closes #7

Author: greenkeeper[bot]

package.json

@@ -21,7 +21,7 @@
   },
   "devDependencies": {
     "babel-eslint": "^10.0.1",
-    "eslint": "^5.10.0",
+    "eslint": "^6.2.0",
     "eslint-config-scratch": "^5.0.0",
     "tap": "^12.1.1"
   }