Merge pull request #89 from arduino/dependabot/pip/black-21.12b0

Bump black from 21.11b1 to 21.12b0

Author: per1234

poetry.lock

@@ -11,7 +11,7 @@ authors = ["Arduino <info@arduino.cc>"]
 python = "^3.9"
 
 [tool.poetry.dev-dependencies]
-black = "^21.11b1"
+black = "^21.12b0"
 codespell = "^2.1.0"
 flake8 = "^4.0.1"
 invoke = "^1.6.0"