build(deps-dev): bump pytest from 5.4.3 to 6.2.2

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.3 to 6.2.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@5.4.3...6.2.2)

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