Django channels stubs (#13939)

stubs/channels/METADATA.toml

@@ -0,0 +1,8 @@
+version = "4.2.*"
+upstream_repository = "https://github.com/django/channels"
+requires = ["django-stubs>=4.2,<5.3", "asgiref"]
+
+[tool.stubtest]
+mypy_plugins = ['mypy_django_plugin.main']
+mypy_plugins_config = {"django-stubs" = {"django_settings_module" = "@tests.django_settings"}}
+stubtest_requirements = ["daphne"]