build(deps): bump pygments from 2.7.4 to 2.9.0

Bumps [pygments](https://github.com/pygments/pygments) from 2.7.4 to 2.9.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.7.4...2.9.0)

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

{{cookiecutter.project_slug}}/requirements.txt

@@ -283,7 +283,7 @@ pycparser==2.20
     # via cffi
 pyflakes==2.2.0
     # via flake8
-pygments==2.7.4
+pygments==2.9.0
     # via
     #   bpython
     #   doc8