Bump pytest-runner from 4.2 to 4.4

Bumps [pytest-runner](https://github.com/pytest-dev/pytest-runner) from 4.2 to 4.4.
- [Release notes](https://github.com/pytest-dev/pytest-runner/releases)
- [Changelog](https://github.com/pytest-dev/pytest-runner/blob/master/docs/history.rst)
- [Commits](pytest-dev/pytest-runner@4.2...4.4)

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

Author: dependabot-support