Bump pytest from 6.2.3 to 6.2.4 (#454)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.2.3 to 6.2.4.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@6.2.3...6.2.4)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

dev-requirements.txt

@@ -1,6 +1,6 @@
 -r requirements.txt
 coverage
-pytest==6.2.3
+pytest==6.2.4
 pytest-asyncio==0.14.0
 pytest-aiohttp==0.3.0
 pytest-cov==2.11.1