chore(deps): update dependency eslint to v5.6.0

Author: renovate-bot

package-lock.json

@@ -16,7 +16,7 @@
     "babel-plugin-istanbul": "4.1.6",
     "babel-preset-env": "1.7.0",
     "babel-register": "6.26.0",
-    "eslint": "5.5.0",
+    "eslint": "5.6.0",
     "eslint-config-airbnb-base": "13.1.0",
     "eslint-config-prettier": "2.10.0",
     "eslint-plugin-import": "2.14.0",