Bump mezzio/mezzio-fastroute from 3.11.0 to 3.12.0

Bumps [mezzio/mezzio-fastroute](https://github.com/mezzio/mezzio-fastroute) from 3.11.0 to 3.12.0.
- [Release notes](https://github.com/mezzio/mezzio-fastroute/releases)
- [Commits](mezzio/mezzio-fastroute@3.11.0...3.12.0)

---
updated-dependencies:
- dependency-name: mezzio/mezzio-fastroute
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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