build(deps-dev): bump pytest from 6.1.2 to 6.2.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.1.2 to 6.2.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@6.1.2...6.2.1)

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

Pipfile

@@ -5,7 +5,7 @@ verify_ssl = true
 
 [dev-packages]
 black = "==20.8b1"
-pytest = "==6.1.2"
+pytest = "==6.2.1"
 pytest-asyncio = "==0.14.0"
 pytest-cov = "==2.10.1"
 pytest-mock = "==3.3.1"