chore(package): update ember-cli-eslint to version 5.1.0

Closes #1744

Author: greenkeeper[bot]

package.json

@@ -40,7 +40,7 @@
     "ember-cli-deploy-sentry": "^0.5.2",
     "ember-cli-deploy-slack": "1.0.0",
     "ember-cli-dotenv": "2.0.0",
-    "ember-cli-eslint": "^4.2.1",
+    "ember-cli-eslint": "^5.1.0",
     "ember-cli-flash": "1.6.3",
     "ember-cli-htmlbars": "^2.0.1",
     "ember-cli-htmlbars-inline-precompile": "^1.0.0",