chore(deps): update dependency google-cloud-bigquery to v2.16.1 (#189)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-bigquery](https://togithub.com/googleapis/python-bigquery) | `==2.14.0` -> `==2.16.1` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.16.1/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.16.1/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.16.1/compatibility-slim/2.14.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.16.1/confidence-slim/2.14.0)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>googleapis/python-bigquery</summary>

### [`v2.16.1`](https://togithub.com/googleapis/python-bigquery/blob/master/CHANGELOG.md#&#8203;2161-httpswwwgithubcomgoogleapispython-bigquerycomparev2160v2161-2021-05-12)

[Compare Source](https://togithub.com/googleapis/python-bigquery/compare/v2.16.0...v2.16.1)

### [`v2.16.0`](https://togithub.com/googleapis/python-bigquery/blob/master/CHANGELOG.md#&#8203;2160-httpswwwgithubcomgoogleapispython-bigquerycomparev2150v2160-2021-05-05)

[Compare Source](https://togithub.com/googleapis/python-bigquery/compare/v2.15.0...v2.16.0)

##### Features

-   add with_name() to ScalarQueryParameterType ([#&#8203;644](https://www.github.com/googleapis/python-bigquery/issues/644)) ([6cc6876](https://www.github.com/googleapis/python-bigquery/commit/6cc6876eb0e5bf49fdc047256a945dcf1b289576))

##### Dependencies

-   expand supported pyarrow versions to v4 ([#&#8203;643](https://www.github.com/googleapis/python-bigquery/issues/643)) ([9e1d386](https://www.github.com/googleapis/python-bigquery/commit/9e1d3869c2024fe7a8af57ff59838d904ca5db03))

### [`v2.15.0`](https://togithub.com/googleapis/python-bigquery/blob/master/CHANGELOG.md#&#8203;2150-httpswwwgithubcomgoogleapispython-bigquerycomparev2140v2150-2021-04-29)

[Compare Source](https://togithub.com/googleapis/python-bigquery/compare/v2.14.0...v2.15.0)

##### Features

-   Extended DB API parameter syntax to optionally provide parameter types ([#&#8203;626](https://www.github.com/googleapis/python-bigquery/issues/626)) ([8bcf397](https://www.github.com/googleapis/python-bigquery/commit/8bcf397fbe2527e06317741875a059b109cfcd9c))

##### Bug Fixes

-   add DECIMAL and BIGDECIMAL as aliases for NUMERIC and BIGNUMERIC ([#&#8203;638](https://www.github.com/googleapis/python-bigquery/issues/638)) ([aa59023](https://www.github.com/googleapis/python-bigquery/commit/aa59023317b1c63720fb717b3544f755652da58d))
-   The DB API Binary function accepts bytes data ([#&#8203;630](https://www.github.com/googleapis/python-bigquery/issues/630)) ([4396e70](https://www.github.com/googleapis/python-bigquery/commit/4396e70771af6889d3242c37c5ff2e80241023a2))

</details>

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bigquery_storage/to_dataframe/requirements.txt

@@ -1,6 +1,6 @@
 google-auth==1.30.0
 google-cloud-bigquery-storage==2.4.0
-google-cloud-bigquery==2.14.0
+google-cloud-bigquery==2.16.1
 pyarrow==4.0.0
 ipython==7.10.2; python_version > '3.0'
 ipython==5.9.0; python_version < '3.0'