chore(package): update eslint to version 4.19.0

Closes #8

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
     "babelify": "8.0.0",
     "check-node-version": "2.1.0",
     "commitplease": "3.1.0",
-    "eslint": "4.11.0",
+    "eslint": "4.19.0",
     "eslint-config-xo-space": "0.17.0",
     "eslint-plugin-import": "2.8.0",
     "eslint-plugin-jest": "21.3.2",