Bump waitress from 2.1.1 to 2.1.2 (#5)

Bumps [waitress](https://github.com/Pylons/waitress) from 2.1.1 to 2.1.2.
- [Release notes](https://github.com/Pylons/waitress/releases)
- [Changelog](https://github.com/Pylons/waitress/blob/v2.1.2/CHANGES.txt)
- [Commits](Pylons/waitress@v2.1.1...v2.1.2)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -13,5 +13,5 @@ toml==0.10.2
 typing==3.7.4.3
 urllib3==1.26.5
 vvspy==1.1.3
-waitress==2.1.1
+waitress==2.1.2
 Werkzeug==1.0.1