python verison 3.9 does not work with pre-commit

Author: tobixen

.github/workflows/ci.yaml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
 
     steps:
     - name: Checkout repository

pyproject.toml

@@ -6,7 +6,11 @@ authors = [
     {name = "Tobias Brox",email = "tobias@redpill-linpro.com"}
 ]
 readme = "README.md"
-requires-python = ">=3.9,<4.0"
+## caldav still supports 3.9, so we would definitively like
+## to support python 3.9 for a while.  However, the precommit
+## logic I just threw in requires me to officially ditch 3.9-support.
+## I guess the caldav tests will still exercise this library with 3.9.
+requires-python = ">=3.10,<4.0"
 dependencies = [
 ]