[UPDATED] -- Upgraded django-db-mailer for Django 4.2+ compatibility by replacing deprecated imports and fields.

Upgrade django-db-mailer for compatibility with Django 4.2+

Replaced deprecated ugettext_lazy() with gettext_lazy() in accordance with Django 4.2+ standards. Issue #130
Updated deprecated url() imports with re_path() from django.urls to ensure compatibility. Issue #130
Modified NullBooleanField() to BooleanField(null=True) in models to remove deprecated field usage. Issue #126
General cleanup of outdated imports and syntax.
Verified changes with test cases and confirmed compatibility with Django 4.2 LTS and higher.

This commit ensures the library continues to function with modern versions of Django while maintaining backward compatibility where possible.

LPgenerator / django-db-mailer