Convert enums to lists for Django choices

Makes using in Django templates easier

calendarweek/django.py

@@ -61,25 +61,25 @@ def i18n_month_abbrs(loc: Optional[str] = None) -> Tuple[str]:
 def i18n_day_name_choices(loc: Optional[str] = None) -> Tuple[Tuple[int, str]]:
     """ Return an enumeration of day names for the current locale. """
 
-    return enumerate(i18n_day_names(loc))
+    return list(enumerate(i18n_day_names(loc)))
 
 
 def i18n_day_abbr_choices(loc: Optional[str] = None) -> Tuple[Tuple[int, str]]:
     """ Return an enumeration of day name abbreviations for the current locale. """
 
-    return enumerate(i18n_day_abbrs(loc))
+    return list(enumerate(i18n_day_abbrs(loc)))
 
 
 def i18n_month_name_choices(loc: Optional[str] = None) -> Tuple[Tuple[int, str]]:
     """ Return an enumeration of month names for the current locale. """
 
-    return enumerate(i18n_month_names(loc))
+    return list(enumerate(i18n_month_names(loc)))
 
 
 def i18n_month_abbr_choices(loc: Optional[str] = None) -> Tuple[Tuple[int, str]]:
     """ Return an enumeration of month name abbreviations for the current locale. """
 
-    return enumerate(i18n_month_abbrs(loc))
+    return list(enumerate(i18n_month_abbrs(loc)))
 
 
 def i18n_js(request: HttpRequest) -> HttpResponse: