fix tox python versions

.github/workflows/dev.yml

@@ -2,7 +2,7 @@
 
 name: dev workflow
 
-# Controls when the action will run. 
+# Controls when the action will run.
 on:
   # Triggers the workflow on push or pull request events but only for the master branch
   push:
@@ -20,7 +20,7 @@ jobs:
     # The type of runner that the job will run on
     strategy:
       matrix:
-        python-versions: [3.6, 3.7, 3.8, 3.9]
+        python-versions: [3.8, 3.9, '3.10', 3.11, 3.12]
         os: [ubuntu-18.04, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
 

CONTRIBUTING.md

@@ -95,7 +95,7 @@ Before you submit a pull request, check that it meets these guidelines:
 2. If the pull request adds functionality, the docs should be updated. Put
    your new functionality into a function with a docstring, and add the
    feature to the list in README.md.
-3. The pull request should work for Python 3.6, 3.7, 3.8, 3.9 and for PyPy. Check
+3. The pull request should work for Python 3.8, 3.9, 3.10, 3.11, 3.12 and for PyPy. Check
    https://github.com/jwaschkau/django-unpoly/actions
    and make sure that the tests pass for all supported Python versions.
 

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 isolated_build = true
-envlist = py36, py37, py38, py39, lint, format
+envlist = py38, py39, py310, py311, py312, lint, format
 
 [gh-actions]
 python =