Fix tox config and lint Python version

Author: philipstarkey

.github/workflows/ci.yml

@@ -68,10 +68,10 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Set up Python 3.6
+    - name: Set up Python 3.12
       uses: actions/setup-python@v2
       with:
-        python-version: '3.6'
+        python-version: '3.12'
 
     - name: Install tox and flake8 packages
       run: pip install tox tox-gh-actions flake8

tox.ini

@@ -1,8 +1,4 @@
 [tox]
-# Having the .tox directory in the project directory slows down the
-# `pip install -e .` step required by `usedevelop = true` considerably.
-# By moving it out of the way (~500MB), we trim test execution time by > 80%.
-toxworkdir = {homedir}/.toxenvs/django-click
 envlist =
     dj{42,50},flake8
 
@@ -12,7 +8,7 @@ django =
     5.0: dj50
 
 [testenv]
-usedevelop = true
+package = editable
 passenv = LC_ALL, LANG, LC_CTYPE
 setenv =
     DJANGO_SETTINGS_MODULE=testprj.settings