Bump @web/dev-server from 0.3.3 to 0.3.7

Bumps [@web/dev-server](https://github.com/modernweb-dev/web/tree/HEAD/packages/dev-server) from 0.3.3 to 0.3.7.
- [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/[email protected]/packages/dev-server)

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

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

package.json

@@ -31,7 +31,7 @@
     "@github/prettier-config": "^0.0.6",
     "@open-wc/testing": "^3.2.0",
     "@rollup/plugin-node-resolve": "^15.2.3",
-    "@web/dev-server": "^0.3.1",
+    "@web/dev-server": "^0.3.7",
     "@web/dev-server-esbuild": "^0.4.3",
     "@web/rollup-plugin-html": "^2.0.1",
     "@web/test-runner": "^0.17.2",