Run tests with Python 3.9 and 3.13 instead of 3.8 and 3.12.

Python 3.8 reached end-of-life and Python 3.13 became available on 2024-10-07.

Author: fdxmw

.github/workflows/python-test.yml

@@ -9,7 +9,9 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.12]
+        # When changing the following line, be sure to update `envlist` in
+        # tox.ini
+        python-version: [3.9, 3.13]
 
     steps:
     - uses: actions/checkout@v4

tox.ini

@@ -1,20 +1,20 @@
 [tox]
 # When changing the following line, be sure to update 'python-version' in
 # .github/workflows/python-test.yml
-envlist = py{3.8,3.12}-{test}, pycodestyle
+envlist = py{3.9,3.13}-{test}, pycodestyle
 
 [gh-actions]
 python =
-    3.8: py3.8
-    3.12: py3.12, pycodestyle
+    3.9: py3.9
+    3.13: py3.13, pycodestyle
 
 [testenv]
 deps = test: -rrequirements.txt
        pycodestyle: pycodestyle
 
 envdir =
-    py3.8: {toxworkdir}/3.8
-    py3.12: {toxworkdir}/3.12
+    py3.9: {toxworkdir}/3.9
+    py3.13: {toxworkdir}/3.13
     pycodestyle: {toxworkdir}/pycodestyle
 
 setenv =