deps: expand pyarrow dependencies to include version 2

[tswast]

Pyarrow 2.0 includes several bug fixes. The wire format remains the same, so it continues to be compatible with the BigQuery Storage API.

[tswast]

Test failure is relevant

______ TestRowIterator.test_to_dataframe_timestamp_out_of_pyarrow_bounds _______

self = <tests.unit.test_table.TestRowIterator testMethod=test_to_dataframe_timestamp_out_of_pyarrow_bounds>

    @pytest.mark.xfail(
        six.PY2,
        reason=(
            "Requires pyarrow>-1.0 to work, but the latter is not compatible "
            "with Python 2 anymore."
        ),
    )
    @unittest.skipIf(pandas is None, "Requires `pandas`")
    @unittest.skipIf(pyarrow is None, "Requires `pyarrow`")
    def test_to_dataframe_timestamp_out_of_pyarrow_bounds(self):
        from google.cloud.bigquery.schema import SchemaField
    
        schema = [SchemaField("some_timestamp", "TIMESTAMP")]
        rows = [
            {"f": [{"v": "81953424000.0"}]},  # 4567-01-01 00:00:00  UTC
            {"f": [{"v": "253402214400.0"}]},  # 9999-12-31 00:00:00  UTC
        ]
        path = "/foo"
        api_request = mock.Mock(return_value={"rows": rows})
        row_iterator = self._make_one(_mock_client(), api_request, path, schema)
    
        df = row_iterator.to_dataframe(create_bqstorage_client=False)
    
        self.assertIsInstance(df, pandas.DataFrame)
        self.assertEqual(len(df), 2)  # verify the number of rows
        self.assertEqual(list(df.columns), ["some_timestamp"])
>       self.assertEqual(
            list(df["some_timestamp"]),
            [dt.datetime(4567, 1, 1), dt.datetime(9999, 12, 31)],
        )
E       AssertionError: Lists differ: [date[25 chars] 0, 0, tzinfo=<UTC>), datetime.datetime(9999, [23 chars]TC>)] != [date[25 chars] 0, 0), datetime.datetime(9999, 12, 31, 0, 0)]
E       
E       First differing element 0:
E       datetime.datetime(4567, 1, 1, 0, 0, tzinfo=<UTC>)
E       datetime.datetime(4567, 1, 1, 0, 0)
E       
E       + [datetime.datetime(4567, 1, 1, 0, 0), datetime.datetime(9999, 12, 31, 0, 0)]
E       - [datetime.datetime(4567, 1, 1, 0, 0, tzinfo=<UTC>),
E       -  datetime.datetime(9999, 12, 31, 0, 0, tzinfo=<UTC>)]

tests/unit/test_table.py:2345: AssertionError

[tswast]

Fixed the test failure in the latest commit. Even though the behavior is slightly different between pyarrow 1.0 and 2.0 as seen in the commit, I think it's worth keeping a wider range due to Arrow's use as a core library.