build(deps): bump pytest-asyncio from 0.20.3 to 0.21.0 (#559)

Bumps [pytest-asyncio](https://github.com/pytest-dev/pytest-asyncio) from 0.20.3 to 0.21.0.
- [Release notes](https://github.com/pytest-dev/pytest-asyncio/releases)
- [Commits](pytest-dev/pytest-asyncio@v0.20.3...v0.21.0)

---
updated-dependencies:
- dependency-name: pytest-asyncio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

demos/blog/requirements.txt

@@ -11,5 +11,5 @@ sqlalchemy==1.4.45
 # testing
 pytest==7.2.2
 pytest-aiohttp==1.0.4
-pytest-asyncio==0.20.3
+pytest-asyncio==0.21.0
 flake8==6.0.0

demos/moderator/requirements-dev.txt

@@ -14,6 +14,6 @@ ipdb==0.13.13
 mypy==1.1.1
 pytest==7.2.2
 pytest-aiohttp==1.0.4
-pytest-asyncio==0.20.3
+pytest-asyncio==0.21.0
 pytest-cov==4.0.0
 pytest-sugar==0.9.6