Django 6.0 support (#307)

* Remove upper bound on Django version.

This allows it to be installed alongside Django 6 and later.

See https://iscinumpy.dev/post/bound-version-constraints/

* Run tests on Django 6.0 / Python 3.12

.github/workflows/test.yml

@@ -36,6 +36,7 @@ jobs:
         - "5.0"
         - "5.1"
         - "5.2"
+        - "6.0"
         exclude:
           # django 5.2 does not support 3.9
           - python-version: "3.9"
@@ -49,6 +50,13 @@ jobs:
           # django 4.2 does not support 3.13
           - python-version: "3.13"
             django: "4.2"
+          # django 6.0 does not support earlier than 3.12
+          - python-version: "3.9"
+            django: "6.0"
+          - python-version: "3.10"
+            django: "6.0"
+          - python-version: "3.11"
+            django: "6.0"
 
     services:
       mongodb:

README.rst

@@ -41,7 +41,7 @@ Requirements
 Tested with:
 
 * Python 3.9 to 3.13.
-* Django 4.2 to 5.2.
+* Django 4.2 to 6.0.
 
 Brokers
 ~~~~~~~

pyproject.toml

@@ -53,7 +53,7 @@ include = [
 
 [tool.poetry.dependencies]
 python = ">=3.9,<4"
-django = ">=4.2, <6"
+django = ">=4.2"
 django-picklefield = "^3.1"
 
 blessed = { version = "^1.19.1", optional = true }