MOD: Improve Python dev environment config

Author: cjdsellers

tests/test_historical_bento.py

@@ -9,6 +9,7 @@
 import pytest
 from databento.common.bento import Bento, FileBento, MemoryBento
 from databento.common.enums import Compression, Encoding, Schema, SType
+
 from tests.fixtures import get_test_data, get_test_data_path
 
 

tests/test_historical_client.py

@@ -7,6 +7,7 @@
 from databento import FileBento, Historical
 from databento.common.enums import HistoricalGateway, Schema
 from pytest_mock import MockerFixture
+
 from tests.fixtures import get_test_data_path