chore(deps-dev): Bump @cloudflare/workers-types

Bumps [@cloudflare/workers-types](https://github.com/cloudflare/workerd) from 4.20230321.0 to 4.20230518.0.
- [Release notes](https://github.com/cloudflare/workerd/releases)
- [Changelog](https://github.com/cloudflare/workerd/blob/main/RELEASE.md)
- [Commits](https://github.com/cloudflare/workerd/commits)

---
updated-dependencies:
- dependency-name: "@cloudflare/workers-types"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -17,7 +17,7 @@
     "itty-router": "^3.0.12"
   },
   "devDependencies": {
-    "@cloudflare/workers-types": "^4.20230321.0",
+    "@cloudflare/workers-types": "^4.20230518.0",
     "@types/node": "^17.0.45",
     "typescript": "^5.0.3",
     "wrangler": "^2.13.0"