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](Pylons/waitress@v1.4.4...v2.1.1)

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

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

Author: dependabot[bot]

old/requirements.txt

@@ -19,7 +19,7 @@ Mako==1.1.3
 MarkupSafe==1.1.1
 mccabe==0.6.1
 openpyxl==3.0.5
-waitress==1.4.4
+waitress==2.1.1
 psycopg2-binary==2.9.1
 python-dateutil==2.8.1
 python-dotenv==0.14.0
@@ -29,7 +29,7 @@ six==1.15.0
 soupsieve==2.0.1
 toml==0.10.1
 urllib3==1.26.5
-waitress==1.4.4
+waitress==2.1.1
 Werkzeug==1.0.1
 wrapt==1.12.1
 xlrd==1.2.0