Add 'barcode_hash' data to more API serializers: (#3906)

* Add 'barcode_hash' data to more API serializers:

- part
- stock location
- supplier part

* Bump API version

* Make 'barcode_hash' fields read-only via the API

* Fix for Part serializer

InvenTree/company/serializers.py

@@ -294,6 +294,7 @@ class SupplierPartSerializer(InvenTreeModelSerializer):
             'MPN',
             'note',
             'pk',
+            'barcode_hash',
             'packaging',
             'pack_size',
             'part',
@@ -307,6 +308,7 @@ class SupplierPartSerializer(InvenTreeModelSerializer):
 
         read_only_fields = [
             'availability_updated',
+            'barcode_hash',
         ]
 
     @staticmethod