[Security] Bump waitress from 1.3.1 to 1.4.0 (#3604)
[Security] Bump waitress from 1.3.1 to 1.4.0 (#3604)

Bumps [waitress](https://github.com/Pylons/waitress) from 1.3.1 to 1.4.0. **This update includes security fixes.**
- [Release notes](https://github.com/Pylons/waitress/releases)
- [Changelog](https://github.com/Pylons/waitress/blob/master/CHANGES.txt)
- [Commits](https://github.com/Pylons/waitress/compare/v1.3.1...v1.4.0)

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