Set default sort on collect endpoint #508

Signed-off-by: Jono Yang <[email protected]>

packagedb/api.py

@@ -819,7 +819,7 @@ def list(self, request, format=None):
 
         validated_data = serializer.validated_data
         purl = validated_data.get('purl')
-        sort = validated_data.get('sort', [])
+        sort = validated_data.get('sort') or ['-version',]
 
         kwargs = dict()
         # We want this request to have high priority since the user knows the