Bump waitress from 1.4.3 to 3.0.1

Bumps [waitress](https://github.com/Pylons/waitress) from 1.4.3 to 3.0.1.
- [Release notes](https://github.com/Pylons/waitress/releases)
- [Changelog](https://github.com/Pylons/waitress/blob/main/CHANGES.txt)
- [Commits](Pylons/waitress@v1.4.3...v3.0.1)

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

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

requirements.dev.txt

@@ -32,7 +32,7 @@ sphinxcontrib-serializinghtml==1.1.5 # via sphinx
 tox==3.23.0
 typing==3.7.4.3             # via sphinx
 virtualenv==20.4.2        # via tox
-waitress==1.4.3           # via webtest
+waitress==3.0.1           # via webtest
 webob==1.8.5              # via webtest
 webtest==2.0.33           # via flask-webtest
 --editable .