Lint for 3.8

Probably need to target the oldest supported python version, otherwise
things in CI keep breaking (e.g. black reformats for parenthetically
grouped context managers, which aren't supported in 3.8)

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [tool.black]
 line-length = 79
-target_version = ['py311']
+target_version = ['py38']
 
 [tool.isort]
 profile = "black"
@@ -25,7 +25,7 @@ disallow_untyped_calls = true
 disallow_untyped_defs = true
 follow_imports = "silent"
 ignore_missing_imports = true
-python_version = "3.11"
+python_version = "3.8"
 show_column_numbers = true
 warn_incomplete_stub = false
 warn_redundant_casts = true