chore(package): update eslint to version 6.6.0

Closes #3

Author: greenkeeper[bot]

package.json

@@ -24,7 +24,7 @@
     "@babel/register": "^7.4.4",
     "babel-eslint": "^10.0.2",
     "babel-loader": "^8.0.5",
-    "eslint": "^5.16.0",
+    "eslint": "^6.6.0",
     "eslint-config-airbnb": "^17.1.0",
     "eslint-config-prettier": "^6.0.0",
     "eslint-loader": "^2.1.2",