Bump waitress from 1.4.1 to 1.4.2

Bumps [waitress](https://github.com/Pylons/waitress) from 1.4.1 to 1.4.2.
- [Release notes](https://github.com/Pylons/waitress/releases)
- [Changelog](https://github.com/Pylons/waitress/blob/master/CHANGES.txt)
- [Commits](Pylons/waitress@v1.4.1...v1.4.2)

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

requirements.txt

@@ -33,7 +33,7 @@ translationstring==1.3
 ujson==1.35
 urllib3==1.25.7
 venusian==3.0.0
-waitress==1.4.1
+waitress==1.4.2
 WebOb==1.8.5
 zope.deprecation==4.4.0
 zope.interface==4.7.1