Update eslint to the latest version 🚀 (#135)

* chore(package): update eslint to version 6.0.0

* chore(package): update lockfile package-lock.json

Author: greenkeeper[bot]

package-lock.json

@@ -29,7 +29,7 @@
   "devDependencies": {
     "coveralls": "^3.0.3",
     "escape-regexp": "0.0.1",
-    "eslint": "^5.16.0",
+    "eslint": "^6.0.0",
     "eslint-config-xo-space": "^0.21.0",
     "jest": "^24.8.0",
     "mem-fs": "^1.0.0",