Upgrade django-leaflet

Author: Gaël UTARD

requirements.txt

@@ -27,7 +27,7 @@ django-extended-choices==1.3
 django-extensions==2.2.9
 django-filter==2.2.0
 django-geojson==2.11.0
-django-leaflet==0.27.0
+git+https://github.com/GeotrekCE/django-leaflet[email protected]#egg=django-leaflet
 django-modeltranslation==0.13.4
 django-multiselectfield==0.1.5
 django-rest-swagger==2.2.0  # TODO: deprecated, replace with drf-yasg