docs(README): make it clear easy-select2 is not required anymore
docs(README): make it clear easy-select2 is not required anymore

dsanders11/django-advanced-filters,modlinltd/django-advanced-filters,modlinltd/django-advanced-filters,dsanders11/django-advanced-filters,dsanders11/django-advanced-filters,dsanders11/django-advanced-filters,modlinltd/django-advanced-filters