build(deps): bump the test-and-lint-dependencies group with 2 updates

Bumps the test-and-lint-dependencies group with 2 updates: [coverage](https://github.com/nedbat/coveragepy) and [mypy](https://github.com/python/mypy).


Updates `coverage` from 7.6.1 to 7.6.3
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.6.1...7.6.3)

Updates `mypy` from 1.11.2 to 1.12.0
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.11.2...v1.12.0)

---
updated-dependencies:
- dependency-name: coverage
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: test-and-lint-dependencies
- dependency-name: mypy
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: test-and-lint-dependencies
...

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

requirements/lint.txt

@@ -7,7 +7,7 @@
 # (We are not so interested in the specific versions of the tools: the versions
 # are pinned to prevent unexpected linting failures when tools update)
 ruff==0.6.9
-mypy==1.11.2
+mypy==1.12.0
 
 # Required for type stubs
 freezegun==1.5.1

requirements/test.txt

@@ -4,5 +4,5 @@
 -r pinned.txt
 
 # coverage measurement
-coverage==7.6.1
+coverage==7.6.3
 freezegun==1.5.1