#49 Parcels and Districts

* fixes bug in GeometryConflict conflict checking
* WIP: introduces new konova/utils/wfs/spatial holding SpatialWFSFetcher, which can be fed any geometry and it returns found features
* WIP: adds tests for wfs fetching
* updates requirements.txt

konova/models/parcel.py

@@ -40,6 +40,7 @@ class Parcel(UuidModel):
         max_length=1000,
         help_text="Gemarkung"
     )
+    updated_on = models.DateTimeField(auto_now_add=True)
 
     def __str__(self):
         return f"{self.gmrkng} | {self.flr} | {self.flrstck_nnr} | {self.flrstck_zhlr}"