Update changelog.rst
Update changelog.rst

Please review if anything is missing to make a new release
bmihelac/django-import-export,copperleaftech/django-import-export,jnns/django-import-export,daniell/django-import-export,jnns/django-import-export,copperleaftech/django-import-export,django-import-export/django-import-export,bmihelac/django-import-export,bmihelac/django-import-export,jnns/django-import-export,django-import-export/django-import-export,django-import-export/django-import-export,bmihelac/django-import-export,jnns/django-import-export,daniell/django-import-export,copperleaftech/django-import-export,copperleaftech/django-import-export,daniell/django-import-export,daniell/django-import-export,django-import-export/django-import-export