Update async-timeout requirement from ~=4.0.3 to ~=5.0.0 (#70)

Updates the requirements on [async-timeout](https://github.com/aio-libs/async-timeout) to permit the latest version.
- [Release notes](https://github.com/aio-libs/async-timeout/releases)
- [Changelog](https://github.com/aio-libs/async-timeout/blob/master/CHANGES.rst)
- [Commits](aio-libs/async-timeout@v4.0.3...v5.0.0)

---
updated-dependencies:
- dependency-name: async-timeout
  dependency-type: direct:production
...

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

requirements_test.txt

@@ -4,4 +4,4 @@ ta-cmi==3.3.0
 aiohttp_cors
 
 pytest-homeassistant-custom-component==0.13.171
-async_timeout~=4.0.3
+async_timeout~=5.0.0