Make update work with long scalar values (#74)

tableschema_sql/writer.py

@@ -60,7 +60,7 @@ def __prepare_bloom(self):
         columns = [getattr(self.__table.c, key) for key in self.__update_keys]
         keys = select(columns).execution_options(stream_results=True).execute()
         for key in keys:
-            self.__bloom.add(key)
+            self.__bloom.add(tuple(key))
 
     def __insert(self):
         """Insert rows to table