Log Message:
py-django-countries: updated to 5.5

5.5:
Django 3.0 compatibility.
Plugin system for extending the Country object.

5.4:
Renamed Macedonia -> North Macedonia.
Fix an outlying makemigrations error.
Pulled in new translations which were provided but missing from previous version.
Fixed Simplified Chinese translation (needed to be locale/zh_Hans).
Introduce an optional complex format for COUNTRIES_ONLY and COUNTRIES_OVERRIDE \ 
to allow for multiple names for a country, a custom three character code, and a \ 
custom numeric country code.