Bump pytest from 5.4.3 to 6.2.4 (#50)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 5.4.3 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@5.4.3...6.2.4)

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

Signed-off-by: dependabot-preview[bot] <[email protected]>
Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>