chore(deps-dev): bump @ember/test-helpers from 2.2.9 to 2.3.0

Bumps [@ember/test-helpers](https://github.com/emberjs/ember-test-helpers) from 2.2.9 to 2.3.0.
- [Release notes](https://github.com/emberjs/ember-test-helpers/releases)
- [Changelog](https://github.com/emberjs/ember-test-helpers/blob/master/CHANGELOG.md)
- [Commits](emberjs/ember-test-helpers@v2.2.9...v2.3.0)

---
updated-dependencies:
- dependency-name: "@ember/test-helpers"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -45,7 +45,7 @@
     "@clark/eslint-config-node": "^2.2.0",
     "@clark/prettier-config": "^2.2.0",
     "@ember/optional-features": "^2.0.0",
-    "@ember/test-helpers": "^2.2.9",
+    "@ember/test-helpers": "^2.3.0",
     "@glimmer/component": "^1.0.4",
     "@glimmer/tracking": "^1.0.4",
     "broccoli-asset-rev": "^3.0.0",

yarn.lock

@@ -1097,10 +1097,10 @@
     mkdirp "^1.0.4"
     silent-error "^1.1.1"
 
-"@ember/test-helpers@^2.2.9":
-  version "2.2.9"
-  resolved "https://registry.yarnpkg.com/@ember/test-helpers/-/test-helpers-2.2.9.tgz#68cceb50ad5b8adedad5d8bf73b39ff71a07f4a6"
-  integrity sha512-QLwV2ASk7XB9+SLCNKFu+y9iNbTsH2Ah3eaJiHZ01uDgVsYZZfJCINhUB9/sY19VagBQnP5Te3QowI6qw3XeLA==
+"@ember/test-helpers@^2.3.0":
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/@ember/test-helpers/-/test-helpers-2.3.0.tgz#dcd49ecab7b66e7ca02fdc6fcae88cb426c0b60f"
+  integrity sha512-MwG80aJj5NO19CgHHIQyrSXwzo0Xz0Vfx3MrvbzkqZSYowyazOrve8/UEt00ot6h3JxCVnbvL6rY/+G41pLE3A==
   dependencies:
     "@ember/test-waiters" "^2.4.4"
     broccoli-debug "^0.6.5"