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](pygments/pygments@2.6.1...2.7.4)

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

requirements.txt

@@ -38,7 +38,7 @@ prompt-toolkit==3.0.5
 ptyprocess==0.6.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
-Pygments==2.6.1
+Pygments==2.7.4
 pykube-ng==20.5.0
 python-dateutil==2.8.1
 pytz==2020.1