add dependency wagtail-modeladmin

setup.py

@@ -21,6 +21,7 @@ setup(
         "Django>=3.2",
         "django-enumchoicefield>=1.1.0",
         "bcp47==0.0.4",
+        "wagtail-modeladmin==2.0.0",
     ],
     extras_require={"testing": ["mock==2.0.0"]},
     zip_safe=False,