Bump waitress from 1.4.4 to 2.1.1

Bumps [waitress](https://github.com/Pylons/waitress) from 1.4.4 to 2.1.1.
- [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/v1.4.4...v2.1.1)

---
updated-dependencies:
- dependency-name: waitress
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -18,7 +18,7 @@ colorama = "^0.4.3"
 dice = "^3.1.0"
 flask = "^1.1.2"
 requests = "^2.24.0"
-waitress = "^1.4.4"
+waitress = ">=1.4.4,<3.0.0"
 dataset = "^1.3.2"
 
 [tool.poetry.dev-dependencies]