Bump pygments from 2.3.1 to 2.6.1 in /src
Bump pygments from 2.3.1 to 2.6.1 in /src

Bumps [pygments](https://github.com/pygments/pygments) from 2.3.1 to 2.6.1.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](https://github.com/pygments/pygments/compare/2.3.1...2.6.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
briehl/narrative,briehl/narrative,kbase/narrative,briehl/narrative,pranjan77/narrative,pranjan77/narrative,kbase/narrative,pranjan77/narrative,kbase/narrative,kbase/narrative,briehl/narrative,pranjan77/narrative,kbase/narrative,briehl/narrative,pranjan77/narrative,pranjan77/narrative,kbase/narrative,briehl/narrative,pranjan77/narrative,briehl/narrative