chore(package): update eslint to version 6.6.0

Closes #9

Author: greenkeeper[bot]

package.json

@@ -15,7 +15,7 @@
     "discord.js-commando": "^0.10.0"
   },
   "devDependencies": {
-    "eslint": "^5.0.0",
+    "eslint": "^6.6.0",
     "eslint-config-standard": "^11.0.0",
     "eslint-plugin-import": "^2.11.0",
     "eslint-plugin-node": "^6.0.1",