Merge pull request #10 from ember-cli/NullVoxPopuli-patch-

Add @ember/test-waiters

Author: NullVoxPopuli

files/package.json

@@ -51,6 +51,7 @@
     "@ember/optional-features": "^2.2.0",
     "@ember/string": "^4.0.0",
     "@ember/test-helpers": "^5.1.0",
+    "@ember/test-waiters": "^4.1.0",
     "@embroider/macros": "^1.16.12",
     "@embroider/core": "^4.0.0-alpha.0",
     "@embroider/vite": "^1.0.0-alpha.0",