Add Python 3.14 to CI workflow matrix (#2208)

* Add Python 3.14 to CI workflow matrix

Python v3.14 -- October 7th
* https://www.python.org/download/pre-releases
* https://www.python.org/downloads/release/python-3140rc3
* https://docs.python.org/3.14/whatsnew/3.14.html
* https://code.djangoproject.com/ticket/35844
> Django 5.2 will be the first version to support Python 3.14

* tox.ini: Add py314

* Update test matrix to exclude Python 3.13 and 3.14

Author: cclauss

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
       fail-fast: false
       max-parallel: 5
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
 
     services:
       mariadb:
@@ -73,25 +73,33 @@ jobs:
       fail-fast: false
       max-parallel: 5
       matrix:
-        # Skip 3.13 here, it needs the psycopg3 / postgis3 database
-        python-version: ['3.9', '3.10', '3.11', '3.12']
-        database: [postgresql, postgis]
-        # Add psycopg3 to our matrix for modern python versions
-        include:
-            - python-version: '3.10'
-              database: psycopg3
-            - python-version: '3.11'
-              database: psycopg3
-            - python-version: '3.12'
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
+        database: [postgresql, postgis, psycopg3]
+        exclude:
+            - python-version: '3.9'
               database: psycopg3
             - python-version: '3.13'
-              database: psycopg3
+              database: postgis
+            - python-version: '3.13'
+              database: postgresql
+            - python-version: '3.14'
+              database: postgis
+            - python-version: '3.14'
+              database: postgresql
+        # Add postgis3 to our matrix for modern Python versions
+        include:
             - python-version: '3.13'
               database: postgis3
             - python-version: '3.13'
               database: psycopg3
               env:
                 DJANGO_SELENIUM_TESTS=true
+            - python-version: '3.14'
+              database: postgis3
+            - python-version: '3.14'
+              database: psycopg3
+              env:
+                DJANGO_SELENIUM_TESTS=true
 
     services:
       postgres:
@@ -155,7 +163,7 @@ jobs:
       fail-fast: false
       max-parallel: 5
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
 
     steps:
     - uses: actions/checkout@v5

tox.ini

@@ -6,6 +6,7 @@ envlist =
     py{39,310,311,312}-dj{42}-{sqlite,postgresql,postgis,mysql}
     py{310,311,312}-dj{42,50,51,52}-{sqlite,postgresql,psycopg3,postgis,mysql}
     py{313}-dj{51,52,main}-{sqlite,psycopg3,postgis3,mysql}
+    py{314}-dj{52,main}-{sqlite,psycopg3,postgis3,mysql}
 
 [testenv]
 deps =
@@ -52,28 +53,28 @@ pip_pre = True
 commands = python -b -W always -m coverage run -m django test -v2 {posargs:tests}
 
 
-[testenv:py{39,310,311,312,313}-dj{42,50,51,52,main}-{postgresql,psycopg3}]
+[testenv:py{39,310,311,312,313,314}-dj{42,50,51,52,main}-{postgresql,psycopg3}]
 setenv =
     {[testenv]setenv}
     DB_BACKEND = postgresql
     DB_PORT = {env:DB_PORT:5432}
 
 
-[testenv:py{39,310,311,312,313}-dj{42,50,51,52,main}-{postgis,postgis3}]
+[testenv:py{39,310,311,312,313,314}-dj{42,50,51,52,main}-{postgis,postgis3}]
 setenv =
     {[testenv]setenv}
     DB_BACKEND = postgis
     DB_PORT = {env:DB_PORT:5432}
 
 
-[testenv:py{39,310,311,312,313}-dj{42,50,51,52,main}-mysql]
+[testenv:py{39,310,311,312,313,314}-dj{42,50,51,52,main}-mysql]
 setenv =
     {[testenv]setenv}
     DB_BACKEND = mysql
     DB_PORT = {env:DB_PORT:3306}
 
 
-[testenv:py{39,310,311,312,313}-dj{42,50,51,52,main}-sqlite]
+[testenv:py{39,310,311,312,313,314}-dj{42,50,51,52,main}-sqlite]
 setenv =
     {[testenv]setenv}
     DB_BACKEND = sqlite3
@@ -103,6 +104,7 @@ python =
     3.11: py311
     3.12: py312
     3.13: py313
+    3.14: py314
 
 [gh-actions:env]
 DB_BACKEND =