Bump pygments from 2.6.1 to 2.7.4

Bumps [pygments](https://github.com/pygments/pygments) from 2.6.1 to 2.7.4.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](https://github.com/pygments/pygments/compare/2.6.1...2.7.4)

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

requirements.txt

@@ -56,7 +56,7 @@ prompt-toolkit==3.0.5
 ptyprocess==0.6.0
 pycparser==2.18
 pyfakewebcam==0.1.0
-Pygments==2.6.1
+Pygments==2.7.4
 pylint==2.4.4
 pyOpenSSL==19.1.0
 pyparsing==2.4.6