Revert "Revert "Update eslint (dev dep) to ^5.0.0""

This reverts commit ba49ffc.

Author: papandreou

package.json

@@ -32,7 +32,7 @@
   "devDependencies": {
     "babel-eslint": "^8.2.3",
     "coveralls": "^3.0.1",
-    "eslint": "^4.19.1",
+    "eslint": "^5.0.0",
     "istanbul": "^0.4.5",
     "mocha": "^5.2.0"
   },