chore(package): update eslint-plugin-ember to version 6.1.0

Closes #31

Author: greenkeeper[bot]

package.json

@@ -47,7 +47,7 @@
     "ember-source": "~3.2.0",
     "ember-source-channel-url": "^1.0.1",
     "ember-try": "^0.2.23",
-    "eslint-plugin-ember": "^5.0.0",
+    "eslint-plugin-ember": "^6.1.0",
     "eslint-plugin-node": "^6.0.1",
     "loader.js": "^4.2.3",
     "popper.js": "^1.14.0"