build(deps): bump quart from 0.6.13 to 0.20.0 in /tests/requirements

Bumps [quart](https://github.com/pallets/quart) from 0.6.13 to 0.20.0.
- [Release notes](https://github.com/pallets/quart/releases)
- [Changelog](https://github.com/pallets/quart/blob/main/CHANGES.md)
- [Commits](pallets/quart@0.6.13...0.20.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

tests/requirements/reqs-asgi-2.txt

@@ -1,4 +1,4 @@
-quart==0.6.13
+quart==0.20.0
 MarkupSafe<2.1
 jinja2==3.1.5
 async-asgi-testclient