Bump pip-tools from 3.9.0 to 4.0.0
Bump pip-tools from 3.9.0 to 4.0.0

Bumps [pip-tools](https://github.com/jazzband/pip-tools) from 3.9.0 to 4.0.0.
- [Release notes](https://github.com/jazzband/pip-tools/releases)
- [Changelog](https://github.com/jazzband/pip-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jazzband/pip-tools/compare/3.9.0...4.0.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
liiight/notifiers