chore: upgrade ember-cli to 3.17.x

Author: LevelbossMike

package.json

@@ -19,7 +19,7 @@
     "broccoli-asset-rev": "^2.4.2",
     "chai": "^3.5.0",
     "chai-as-promised": "^6.0.0",
-    "ember-cli": "^2.12.0",
+    "ember-cli": "~3.17.0",
     "ember-cli-release": "1.0.0-beta.2",
     "eslint": "^3.18.0",
     "github": "^0.2.4",