build(deps): bump pytest-asyncio from 0.17.2 to 0.20.2 in /tools/base

Bumps [pytest-asyncio](https://github.com/pytest-dev/pytest-asyncio) from 0.17.2 to 0.20.2.
- [Release notes](https://github.com/pytest-dev/pytest-asyncio/releases)
- [Changelog](https://github.com/pytest-dev/pytest-asyncio/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-asyncio@v0.17.2...v0.20.2)

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

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

tools/base/requirements.txt

@@ -624,9 +624,9 @@ pytest==6.2.5 \
     #   pytest-asyncio
     #   pytest-cov
     #   pytest-patches
-pytest-asyncio==0.17.2 \
-    --hash=sha256:6d895b02432c028e6957d25fc936494e78c6305736e785d9fee408b1efbc7ff4 \
-    --hash=sha256:e0fe5dbea40516b661ef1bcfe0bd9461c2847c4ef4bb40012324f2454fb7d56d
+pytest-asyncio==0.20.2 \
+    --hash=sha256:07e0abf9e6e6b95894a39f688a4a875d63c2128f76c02d03d16ccbc35bcc0f8a \
+    --hash=sha256:32a87a9836298a881c0ec637ebcc952cfe23a56436bdc0d09d1511941dd8a812
     # via -r requirements.in
 pytest-cov==3.0.0 \
     --hash=sha256:578d5d15ac4a25e5f961c938b85a05b09fdaae9deef3bb6de9a6e766622ca7a6 \