Unit tests emit deprecation warnings

[tseaver]

$ .nox/unit-3-8/bin/py.test tests/unit/
============================= test session starts ==============================
platform linux -- Python 3.8.1, pytest-6.2.4, py-1.10.0, pluggy-0.13.1
rootdir: /home/tseaver/projects/agendaless/Google/src/python-storage
plugins: cov-2.12.1
collected 1028 items                                                           

tests/unit/test__helpers.py ....................................         [  3%]
tests/unit/test__http.py .........                                       [  4%]
tests/unit/test__signing.py .s.......................................... [  8%]
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tests/unit/test_acl.py ................................................. [ 17%]
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tests/unit/test_batch.py ........................                        [ 21%]
tests/unit/test_blob.py ................................................ [ 26%]
........................................................................ [ 33%]
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...............................                                          [ 57%]
tests/unit/test_bucket.py .............................................. [ 61%]
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..............................                                           [ 78%]
tests/unit/test_client.py .............................................. [ 83%]
.......................................................                  [ 88%]
tests/unit/test_fileio.py .................................              [ 91%]
tests/unit/test_hmac_key.py ..............................               [ 94%]
tests/unit/test_notification.py .............................            [ 97%]
tests/unit/test_retry.py ..........................                      [100%]

=============================== warnings summary ===============================
tests/unit/test_blob.py::Test_Blob::test_compose_w_if_generation_match_and_if_s_generation_match
  /home/tseaver/projects/agendaless/Google/src/python-storage/tests/unit/test_blob.py:4319: DeprecationWarning: ("'if_generation_match: type list' is deprecated and supported for backwards-compatability reasons only.  Use 'if_source_generation_match' instead' to match source objects' generations.",)
    destination.compose(

tests/unit/test_blob.py::Test_Blob::test_download_as_string_no_retry
  /home/tseaver/projects/agendaless/Google/src/python-storage/google/cloud/storage/blob.py:1516: PendingDeprecationWarning: Blob.download_as_string() is deprecated and will be removed in future.Use Blob.download_as_bytes() instead.
    warnings.warn(

tests/unit/test_blob.py::Test_Blob::test_upload_from_filename_with_num_retries
  /home/tseaver/projects/agendaless/Google/src/python-storage/google/cloud/storage/blob.py:2712: DeprecationWarning: `num_retries` has been deprecated and will be removed in a future release. Use the `retry` argument with a Retry or ConditionalRetryPolicy object, or None, instead.
    self.upload_from_file(

tests/unit/test_blob.py::Test_Blob::test_upload_from_string_w_text_w_num_retries
  /home/tseaver/projects/agendaless/Google/src/python-storage/google/cloud/storage/blob.py:2844: DeprecationWarning: `num_retries` has been deprecated and will be removed in a future release. Use the `retry` argument with a Retry or ConditionalRetryPolicy object, or None, instead.
    self.upload_from_file(

tests/unit/test_fileio.py::TestBlobWriterBinary::test_num_retries_and_retry_conflict
tests/unit/test_fileio.py::TestBlobWriterBinary::test_write
tests/unit/test_fileio.py::TestBlobWriterText::test_write
  /home/tseaver/projects/agendaless/Google/src/python-storage/google/cloud/storage/fileio.py:382: DeprecationWarning: `num_retries` has been deprecated and will be removed in a future release. Use the `retry` argument with a Retry or ConditionalRetryPolicy object, or None, instead.
    self._initiate_upload()

-- Docs: https://docs.pytest.org/en/stable/warnings.html
================= 1027 passed, 1 skipped, 7 warnings in 11.15s =================