message: only test pd.NA on pandas version >= 1.0.0
diff: -import pandas as pd
  import numpy as np
  import datetime
  import duckdb
  +import pytest
  def assert_nullness(items, null_indices):
  for i in range(len(items)):
  @@ -12,6 +12,7 @@ def assert_nullness(items, null_indices):
  class TestPandasNA(object):
  def test_pandas_na(self, duckdb_cursor):
  + pd = pytest.importorskip('pandas', minversion='1.0.0', reason='Support for pandas.NA has not been added yet')
  # DataFrame containing a single pd.NA
  df = pd.DataFrame(pd.Series([pd.NA]))
  conn = duckdb.default_connection
  