Bump pytest from 6.1.0 to 6.1.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.1.0 to 6.1.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@6.1.0...6.1.2)

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

Author: dependabot[bot]

requirements_dev.txt

@@ -2,7 +2,7 @@ bump2version==1.0.0
 coverage==5.3
 flake8==3.8.3
 pip==20.2.3
-pytest==6.1.0
+pytest==6.1.2
 Sphinx==3.2.1
 tox==3.20.1
 twine==1.15.0