Update black

Cito · Cito · commit b652e4210868 · 2021-09-14T11:12:57.000+02:00
diff --git a/poetry.lock b/poetry.lock
diff --git a/pyproject.toml b/pyproject.toml
@@ -51,7 +51,7 @@ pytest-cov = "^2.12"
 pytest-describe = "^2.0"
 pytest-timeout = "^1.4"
 black = [
-    {version = "21.8b0", python = ">=3.6.2"},
+    {version = "21.9b0", python = ">=3.6.2"},
     {version = "20.8b1", python = "<3.6.2"}
 ]
 flake8 = "^3.9"
diff --git a/tox.ini b/tox.ini
@@ -4,7 +4,7 @@ isolated_build = true
 
 [testenv:black]
 basepython = python3.9
-deps = black==21.8b0
+deps = black==21.9b0
 commands  =
     black src tests setup.py -t py39 --check
 
