Merge pull request #82 from arduino/dependabot/pip/black-21.9b0

Bump black from 21.8b0 to 21.9b0

Author: per1234

poetry.lock

@@ -11,7 +11,7 @@ authors = ["Arduino <[email protected]>"]
 python = "^3.9"
 
 [tool.poetry.dev-dependencies]
-black = "^21.8b0"
+black = "^21.9b0"
 codespell = "^2.1.0"
 flake8 = "^3.9.2"
 invoke = "^1.6.0"