Drop python 3.8; add python 3.13

prompted by the pyproject.toml 'fixes' actually breaking on Python 3.8
but Python 3.8 is EOL so we might as well get rid of it

Author: vanschelven

.github/workflows/ci.yml

@@ -36,7 +36,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v4

pyproject.toml

@@ -12,7 +12,7 @@ authors = [
 ]
 description = "Verbatim copy of Django's CSRF middleware, but with more verbose error messages."
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 license = "BSD-3-Clause"
 classifiers = [
     "Framework :: Django",