Bump black from 21.7b0 to 21.10b0 (#33)

Bumps [black](https://github.com/psf/black) from 21.7b0 to 21.10b0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](https://github.com/psf/black/commits)

---
updated-dependencies:
- dependency-name: black
  dependency-type: direct:development
...

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

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

Author: dependabot[bot]

poetry.lock

@@ -18,7 +18,7 @@ pytest = "^6.2.5"
 pytest-asyncio = "^0.16.0"
 pytest-cov = "^3.0.0"
 mypy = "^0.910"
-black = { version = "^21.7b0", allow-prereleases = true }
+black = { version = "^21.10b0", allow-prereleases = true }
 pre-commit = "^2.15.0"
 
 [tool.black]