build(deps): bump pygments from 2.7.2 to 2.7.4

Bumps [pygments](https://github.com/pygments/pygments) from 2.7.2 to 2.7.4.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.7.2...2.7.4)

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

test-requirements.txt

@@ -217,9 +217,9 @@ pyflakes==2.2.0 \
     --hash=sha256:0d94e0e05a19e57a99444b6ddcf9a6eb2e5c68d3ca1e98e90707af8152c90a92 \
     --hash=sha256:35b2d75ee967ea93b55750aa9edbbf72813e06a66ba54438df2cfac9e3c27fc8 \
     # via flake8
-pygments==2.7.2 \
-    --hash=sha256:381985fcc551eb9d37c52088a32914e00517e57f4a21609f48141ba08e193fa0 \
-    --hash=sha256:88a0bbcd659fcb9573703957c6b9cff9fab7295e6e76db54c9d00ae42df32773 \
+pygments==2.7.4 \
+    --hash=sha256:bc9591213a8f0e0ca1a5e68a479b4887fdc3e75d0774e5c71c31920c427de435 \
+    --hash=sha256:df49d09b498e83c1a73128295860250b0b7edd4c723a32e9bc0d295c7c2ec337 \
     # via sphinx
 pylint==2.6.0 \
     --hash=sha256:bb4a908c9dadbc3aac18860550e870f58e1a02c9f2c204fdf5693d73be061210 \