build(deps): bump itty-router from 5.0.17 to 5.0.18

Bumps [itty-router](https://github.com/kwhitley/itty-router) from 5.0.17 to 5.0.18.
- [Release notes](https://github.com/kwhitley/itty-router/releases)
- [Changelog](https://github.com/kwhitley/itty-router/blob/v5.x/CHANGELOG.md)
- [Commits](kwhitley/itty-router@v5.0.17...v5.0.18)

---
updated-dependencies:
- dependency-name: itty-router
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -20,7 +20,7 @@
   "dependencies": {
     "@hono/node-server": "1.12.0",
     "eventsource-parser": "1.1.2",
-    "itty-router": "5.0.17"
+    "itty-router": "5.0.18"
   },
   "devDependencies": {
     "esbuild": "0.23.0",