Bump time-machine from 2.8.2 to 2.9.0

Bumps [time-machine](https://github.com/adamchainz/time-machine) from 2.8.2 to 2.9.0.
- [Release notes](https://github.com/adamchainz/time-machine/releases)
- [Changelog](https://github.com/adamchainz/time-machine/blob/main/HISTORY.rst)
- [Commits](https://github.com/adamchainz/time-machine/compare/2.8.2...2.9.0)

---
updated-dependencies:
- dependency-name: time-machine
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

requirements-dev.txt

@@ -18,7 +18,7 @@ pytest-mock==3.10.0
 pytest-random-order==1.1.0
 isort==5.11.4
 # For datetime mocking
-time-machine==2.8.2
+time-machine==2.9.0
 # fastapi testing
 httpx==0.23.1