Bump @web/dev-server from 0.3.7 to 0.4.0 (#56)

Bumps [@web/dev-server](https://github.com/modernweb-dev/web/tree/HEAD/packages/dev-server) from 0.3.7 to 0.4.0.
- [Release notes](https://github.com/modernweb-dev/web/releases)
- [Changelog](https://github.com/modernweb-dev/web/blob/master/packages/dev-server/CHANGELOG.md)
- [Commits](https://github.com/modernweb-dev/web/commits/@web/dev-server@0.4.0/packages/dev-server)

---
updated-dependencies:
- dependency-name: "@web/dev-server"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -12,7 +12,7 @@
   },
   "devDependencies": {
     "@open-wc/testing": "^3",
-    "@web/dev-server": "^0.3",
+    "@web/dev-server": "^0.4",
     "@web/test-runner": "^0.17",
     "eslint": "^8",
     "eslint-config-brightspace": "^0.25",