Bump pygments from 2.3.1 to 2.4.0

Bumps [pygments](https://bitbucket.org/birkenfeld/pygments-main) from 2.3.1 to 2.4.0.
- [Changelog](https://bitbucket.org/birkenfeld/pygments-main/src/default/CHANGES)
- [Commits](https://bitbucket.org/birkenfeld/pygments-main/commits)

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

requirements.txt

@@ -4,7 +4,7 @@ chardet==3.0.4
 docutils==0.14
 idna==2.8
 pkginfo==1.5.0.1
-Pygments==2.3.1
+Pygments==2.4.0
 readme-renderer==24.0
 requests==2.21.0
 requests-toolbelt==0.9.1