Fix mypy

Author: lazebnyi

airbyte_cdk/sources/declarative/stream_slicers/declarative_partition_generator.py

@@ -99,7 +99,7 @@ def generate(self) -> Iterable[Partition]:
             yield self._partition_factory.create(stream_slice)
 
     @staticmethod
-    def _make_hashable(obj: Any) -> Hashable:
+    def _make_hashable(obj: Any) -> Any:
         if isinstance(obj, dict):
             return frozenset((k, StreamSlicerPartitionGenerator._make_hashable(v)) for k, v in obj.items())
         if isinstance(obj, list):