Bump cmarkgfm from 0.6.0 to 0.7.0

Bumps [cmarkgfm](https://github.com/theacodes/cmarkgfm) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/theacodes/cmarkgfm/releases)
- [Commits](theacodes/cmarkgfm@0.6.0...0.7.0)

---
updated-dependencies:
- dependency-name: cmarkgfm
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

requirements-dev.txt

@@ -11,7 +11,7 @@ certifi==2021.10.8
 cffi==1.15.0
 charset-normalizer==2.0.9
 click==8.0.3
-cmarkgfm==0.6.0
+cmarkgfm==0.7.0
 codacy-coverage==1.3.11
 coverage==6.2
 distlib==0.3.3