Bump async-timeout from 3.0.1 to 4.0.2

Bumps [async-timeout](https://github.com/aio-libs/async-timeout) from 3.0.1 to 4.0.2.
- [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@v3.0.1...v4.0.2)

---
updated-dependencies:
- dependency-name: async-timeout
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

requirements.txt

@@ -1,7 +1,7 @@
 aioredis==2.0.0
 anyio==3.3.4
 asgiref==3.4.1
-async-timeout==3.0.1
+async-timeout==4.0.2
 attrs==21.2.0
 boto==2.49.0
 CacheControl==0.12.6