Update pytest-asyncio requirement from ~=0.19.0 to ~=0.20.1

Updates the requirements on [pytest-asyncio](https://github.com/pytest-dev/pytest-asyncio) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest-asyncio/releases)
- [Changelog](https://github.com/pytest-dev/pytest-asyncio/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-asyncio@v0.19.0...v0.20.1)

---
updated-dependencies:
- dependency-name: pytest-asyncio
  dependency-type: direct:production
...

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

requirements.txt

@@ -105,7 +105,7 @@ PyQt5-sip~=12.11.0
 pyqtgraph~=0.13.1
 pyrsistent~=0.18.1
 pytest~=7.1.3
-pytest-asyncio~=0.19.0
+pytest-asyncio~=0.20.1
 pytest-cov~=4.0.0
 pytest-forked~=1.4.0
 pytest-mock~=3.10.0