Update tox config

Author: mikemanger

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
     - uses: actions/checkout@v4
@@ -20,4 +20,4 @@ jobs:
     - name: Install dependencies
       run: pip install tox tox-gh
     - name: Test with tox
-      run: tox --skip-missing-interpreters
+      run: tox

tox.ini

@@ -5,7 +5,7 @@
 
 [tox]
 # pip is broken on py32
-envlist = py36, py37, py38, py39, py310, py311, py312, py313
+env_list = py36, py37, py38, py39, py310, py311, py312, py313
 
 [testenv]
 install_command=pip install {packages}
@@ -15,3 +15,14 @@ commands =
 deps =
     coverage
     -e.
+
+[gh]
+python =
+    3.6: py36
+    3.7: py37
+    3.8: py38
+    3.9: py39
+    3.10: py310
+    3.11: py311
+    3.12: py312
+    3.13: py313