Update pytest-asyncio requirement from <0.19,>=0.17 to >=0.17,<0.20 (#1769)

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](https://github.com/pytest-dev/pytest-asyncio/compare/v0.17.0...v0.19.0)

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

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

setup.py

@@ -74,7 +74,7 @@ setup(
         "test": [
             "pytest>=5.2.2,<7.2.0",
             "pytest-xdist>=2.2.1,<2.6",
-            "pytest-asyncio>=0.17,<0.19",
+            "pytest-asyncio>=0.17,<0.20",
             "beautifulsoup4>=4.8.1,<4.12.0",
             "black==22.6.0",
             "blacken-docs==1.12.1",