Bump pytest-asyncio from 0.15.1 to 0.16.0 (#209)

Bumps [pytest-asyncio](https://github.com/pytest-dev/pytest-asyncio) from 0.15.1 to 0.16.0.
- [Release notes](https://github.com/pytest-dev/pytest-asyncio/releases)
- [Commits](pytest-dev/pytest-asyncio@v0.15.1...v0.16.0)

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

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

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

requirements_test.txt

@@ -1,4 +1,4 @@
 asynctest==0.13.0
 pytest==6.2.5
-pytest-asyncio==0.15.1
+pytest-asyncio==0.16.0
 pytest-cov==3.0.0