Version 1.1 breaks backward compatibility

I now need to provide the `use_native_boolean` when creating the sql alchemy engine. ``` elif self.dialect == DBDialect.HANA: | hana_types.SECONDDATE: hana_types.SECONDDATE, self._engine = create_engine(self._url, **self._config.as_dict(), use_native_boolean=False) ``` otherwise I have `TINY_INT` / `BOOLEAN` type conflicts when querying DB. `use_native_boolean` default should be `False` to retain compatibility.