Remove support for Python 3.9 (EOL)

Author: ulgens

.github/workflows/ci.yml

@@ -13,17 +13,12 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - "3.9"
           - "3.10"
           - "3.11"
           - "3.12"
         tox-env:
           - "dj42" # LTS
           - "dj50"
-        exclude:
-          # Python 3.9 is incompatible with Django 5.0+
-          - python-version: "3.9"
-            tox-env: "dj50"
 
     env:
       TOXENV: ${{ matrix.tox-env }}

.pre-commit-config.yaml

@@ -3,4 +3,4 @@ repos:
     rev: v3.21.0
     hooks:
     -   id: pyupgrade
-        args: ["--py39-plus"]
+        args: ["--py310-plus"]

setup.py

@@ -19,7 +19,6 @@
     "Operating System :: OS Independent",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",