Bump @embroider/addon-dev from 4.2.0 to 4.2.1 (#133)

Bumps [@embroider/addon-dev](https://github.com/embroider-build/embroider/tree/HEAD/packages/addon-dev) from 4.2.0 to 4.2.1.
- [Release notes](https://github.com/embroider-build/embroider/releases)
- [Changelog](https://github.com/embroider-build/embroider/blob/main/CHANGELOG.md)
- [Commits](https://github.com/embroider-build/embroider/commits/HEAD/packages/addon-dev)

---
updated-dependencies:
- dependency-name: "@embroider/addon-dev"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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ember-power-datepicker/package.json

@@ -53,7 +53,7 @@
     "@babel/runtime": "^7.23.9",
     "@ember/string": "^3.1.1",
     "@ember/test-helpers": "^3.2.1",
-    "@embroider/addon-dev": "^4.2.0",
+    "@embroider/addon-dev": "^4.2.1",
     "@glimmer/component": "^1.1.2",
     "@glimmer/tracking": "^1.1.2",
     "@glint/core": "^1.3.0",