Bump pytest from 4.6.5 to 4.6.6
Bump pytest from 4.6.5 to 4.6.6

Bumps [pytest](https://github.com/pytest-dev/pytest) from 4.6.5 to 4.6.6.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest/compare/4.6.5...4.6.6)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
pv8/noipy,povieira/noipy