Bump google-cloud-pubsub from 2.4.1 to 2.4.2
Bump google-cloud-pubsub from 2.4.1 to 2.4.2

Bumps [google-cloud-pubsub](https://github.com/googleapis/python-pubsub) from 2.4.1 to 2.4.2.
- [Release notes](https://github.com/googleapis/python-pubsub/releases)
- [Changelog](https://github.com/googleapis/python-pubsub/blob/master/CHANGELOG.md)
- [Commits](https://github.com/googleapis/python-pubsub/compare/2.4.1...v2.4.2)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
mociepka/saleor,mociepka/saleor,mociepka/saleor