support lower python version

Author: baseplate-admin

.github/workflows/CI.yml

@@ -44,7 +44,7 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                python-version: ['3.10', '3.11', '3.12', '3.13', '3.14', 'pypy-3.9', 'pypy-3.10', 'pypy-3.11']
+                python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14', 'pypy-3.9', 'pypy-3.10', 'pypy-3.11']
                 postgres-version: ['14', '15', '16', '17', '18']
         services:
             database:

pyproject.toml

@@ -30,6 +30,7 @@ classifiers = [
     "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",
@@ -39,7 +40,7 @@ classifiers = [
     "Programming Language :: Python :: Implementation :: PyPy",
     "Topic :: Software Development :: Libraries :: Python Modules",
 ]
-requires-python = ">=3.10"
+requires-python = ">=3.9"
 dependencies = ["django"]
 
 [dependency-groups]