Update the tox configuration to use Wagtail 7.0 and Django 5.2

Author: nickmoreton

tox.ini

@@ -1,8 +1,8 @@
 [tox]
 envlist =
   # Django versions with their respectively supported Python versions and the most recent Wagtail LTS
-  py{39,310,311,312,313}-django42-wagtail62
-  py{310,311,312,313}-django{50,51}-wagtail62
+  py{39,310,311,312}-django42-wagtail70
+  py{310,311,312,313}-django{51,52}-wagtail70
   # Old Wagtail versions with the oldest Django LTS and Python
   py39-django42-wagtail52
 isolated_build = True
@@ -18,10 +18,10 @@ python =
 [testenv]
 deps =
     django42: Django>=4.2,<5.0
-    django50: Django>=5.0,<5.1
     django51: Django>=5.1,<5.2
+    django52: Django>=5.2,<5.3
     wagtail52: wagtail>=5.2,<5.3
-    wagtail62: wagtail>=6.2,<6.3
+    wagtail70: wagtail>=7.0,<7.1
     pytest
     pytest-django
 extras = dev