build(deps-dev): bump @open-wc/testing from 3.2.0 to 4.0.0

Bumps [@open-wc/testing](https://github.com/open-wc/open-wc/tree/HEAD/packages/testing) from 3.2.0 to 4.0.0.
- [Release notes](https://github.com/open-wc/open-wc/releases)
- [Changelog](https://github.com/open-wc/open-wc/blob/master/packages/testing/CHANGELOG.md)
- [Commits](https://github.com/open-wc/open-wc/commits/@open-wc/[email protected]/packages/testing)

---
updated-dependencies:
- dependency-name: "@open-wc/testing"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -65,7 +65,7 @@
     "@lerna-lite/publish": "2.6.0",
     "@lerna-lite/run": "2.6.0",
     "@lerna-lite/version": "2.6.0",
-    "@open-wc/testing": "3.2.0",
+    "@open-wc/testing": "4.0.0",
     "@rollup/plugin-node-resolve": "15.1.0",
     "@storybook/addon-a11y": "7.6.7",
     "@storybook/addon-actions": "7.6.7",