Remove python 3.9 leftovers

Author: febus982

.github/workflows/python-tests.yml

@@ -15,7 +15,7 @@ jobs:
   test:
     strategy:
       matrix:
-        version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        version: ["3.10", "3.11", "3.12", "3.13"]
         os: [ubuntu-latest]
     runs-on: ${{ matrix.os }}
     steps:

pyproject.toml

@@ -99,7 +99,7 @@ exclude = ["migrations"]
 # Pydantic plugin causes some issues: https://github.com/pydantic/pydantic-settings/issues/403
 #plugins = "pydantic.mypy,strawberry.ext.mypy_plugin"
 plugins = "strawberry.ext.mypy_plugin"
-python_version = "3.9"
+python_version = "3.10"
 
 [[tool.mypy.overrides]]
 module = [