Bump pygments from 2.3.1 to 2.7.4

Bumps [pygments](https://github.com/pygments/pygments) from 2.3.1 to 2.7.4.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.3.1...2.7.4)

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

Author: dependabot[bot]

requirements.txt

@@ -29,7 +29,7 @@ mccabe==0.6.1
 numpy==1.19.1
 openapi-codec==1.3.2
 pandas==1.1.3
-Pygments==2.3.1
+Pygments==2.7.4
 PyJWT==1.7.1
 pylint==2.5.3
 python-dateutil==2.8.1