Bump @web/test-runner from 0.18.2 to 0.18.3

Bumps [@web/test-runner](https://github.com/modernweb-dev/web/tree/HEAD/packages/test-runner) from 0.18.2 to 0.18.3.
- [Release notes](https://github.com/modernweb-dev/web/releases)
- [Changelog](https://github.com/modernweb-dev/web/blob/master/packages/test-runner/CHANGELOG.md)
- [Commits](https://github.com/modernweb-dev/web/commits/@web/[email protected]/packages/test-runner)

---
updated-dependencies:
- dependency-name: "@web/test-runner"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -34,7 +34,7 @@
     "@web/dev-server": "^0.4.6",
     "@web/dev-server-esbuild": "^1.0.2",
     "@web/rollup-plugin-html": "^2.3.0",
-    "@web/test-runner": "^0.18.2",
+    "@web/test-runner": "^0.18.3",
     "eslint": "^8.57.0",
     "open-props": "^1.7.4",
     "postcss": "^8.4.40",