Update dependency @ember/optional-features to v3

Author: renovate[bot]

package.json

@@ -28,7 +28,7 @@
     "ember-cli-babel": "^7.26.11"
   },
   "devDependencies": {
-    "@ember/optional-features": "2.3.0",
+    "@ember/optional-features": "3.0.0",
     "@ember/string": "3.1.1",
     "@ember/test-helpers": "3.3.1",
     "@embroider/test-setup": "3.0.3",