chore(deps-dev): bump time-machine from 2.19.0 to 3.0.0

Bumps [time-machine](https://github.com/adamchainz/time-machine) from 2.19.0 to 3.0.0.
- [Changelog](https://github.com/adamchainz/time-machine/blob/main/docs/changelog.rst)
- [Commits](https://github.com/adamchainz/time-machine/compare/2.19.0...3.0.0)

---
updated-dependencies:
- dependency-name: time-machine
  dependency-version: 3.0.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

requirements-dev.txt

@@ -18,7 +18,7 @@ pytest-timeout==2.4.0
 pytest-xdist==3.8.0
 isort==7.0.0
 # For datetime mocking
-time-machine==2.19.0
+time-machine==3.0.0
 
 # Convert jupyter notebooks to markdown documents
 nbconvert==7.16.6