Bump docker from 5.0.2 to 5.0.3 (#629)

Bumps [docker](https://github.com/docker/docker-py) from 5.0.2 to 5.0.3.
- [Release notes](https://github.com/docker/docker-py/releases)
- [Commits](docker/docker-py@5.0.2...5.0.3)

---
updated-dependencies:
- dependency-name: docker
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

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

Author: dependabot[bot]

requirements-dev.txt

@@ -9,7 +9,7 @@ pep257==0.7.0
 -e .
 aioredis==2.0.0
 cryptography==3.4.8
-docker==5.0.2
+docker==5.0.3
 pynacl==1.4.0
 pytest==6.2.5
 pytest-aiohttp==0.3.0