chore(package): update eslint to version 6.1.0

Closes #33

Author: greenkeeper[bot]

package.json

@@ -11,7 +11,7 @@
   "author": "IT Shark Pro",
   "license": "MIT",
   "devDependencies": {
-    "eslint": "^5.4.0",
+    "eslint": "^6.1.0",
     "husky": "^1.0.0",
     "mocha": "^5.2.0"
   },