MNT: Fix black targer version to py39 (#144)

snowman2 · web-flow · commit aea7ff8482a3 · 2023-05-23T12:35:10.000-05:00
diff --git a/pyproject.toml b/pyproject.toml
@@ -3,4 +3,4 @@
 requires = ["setuptools", "wheel"]
 
 [tool.black]
-target_version = ['py36']
+target_version = ['py39']
