Bump pygments from 2.13.0 to 2.18.0

Bumps [pygments](https://github.com/pygments/pygments) from 2.13.0 to 2.18.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.13.0...2.18.0)

---
updated-dependencies:
- dependency-name: pygments
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements-test.txt

@@ -4,7 +4,7 @@ coveralls==3.3.1
 flake8==6.0.0
 pep257==0.7.0
 doc8==1.0.0
-Pygments==2.13.0
+Pygments==2.18.0
 mypy==1.10.1
 pytest==8.2.2
 pytest-cov==4.0.0