deps: update dependency com.google.cloud:google-cloud-bigquery to v1.122.0 (#579)
deps: update dependency com.google.cloud:google-cloud-bigquery to v1.122.0 (#579)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-bigquery](https://togithub.com/googleapis/java-bigquery) | minor | `1.120.0` -> `1.122.0` |

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### Release Notes

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

### [`v1.122.0`](https://togithub.com/googleapis/java-bigquery/blob/master/CHANGELOG.md#&#8203;11220-httpswwwgithubcomgoogleapisjava-bigquerycomparev11210v11220-2020-10-01)

[Compare Source](https://togithub.com/googleapis/java-bigquery/compare/v1.121.0...v1.122.0)

##### Features

-   add connectionId support for external data sources ([#&#8203;776](https://www.github.com/googleapis/java-bigquery/issues/776)) ([dcd7daa](https://www.github.com/googleapis/java-bigquery/commit/dcd7daa15d8f820affc9c155ba6d7a9a4c15066d))

### [`v1.121.0`](https://togithub.com/googleapis/java-bigquery/blob/master/CHANGELOG.md#&#8203;11210-httpswwwgithubcomgoogleapisjava-bigquerycomparev11200v11210-2020-10-01)

[Compare Source](https://togithub.com/googleapis/java-bigquery/compare/v1.120.0...v1.121.0)

##### Features

-   add case insensitive for fields get by name ([#&#8203;775](https://www.github.com/googleapis/java-bigquery/issues/775)) ([fcea662](https://www.github.com/googleapis/java-bigquery/commit/fcea66290c2079a6b5f7f9fc340ad706ca30cabd))
-   use bigquery exception ([#&#8203;749](https://www.github.com/googleapis/java-bigquery/issues/749)) ([84d6632](https://www.github.com/googleapis/java-bigquery/commit/84d6632dbbdb9ccaf4afba545ec94a1156a989a2))

##### Bug Fixes

-   nullpointer exception when executionerror is null ([#&#8203;754](https://www.github.com/googleapis/java-bigquery/issues/754)) ([03bda1b](https://www.github.com/googleapis/java-bigquery/commit/03bda1bf79169bf0fca3ee12c1c3dfeb19c2e102))

##### Dependencies

-   update dependency com.google.apis:google-api-services-bigquery to v2-rev20200916-1.30.10 ([#&#8203;768](https://www.github.com/googleapis/java-bigquery/issues/768)) ([6f8911a](https://www.github.com/googleapis/java-bigquery/commit/6f8911a356daf3dec79431491e40b1bfa1c20d4d))
-   update dependency com.google.cloud:google-cloud-shared-dependencies to v0.10.0 ([#&#8203;769](https://www.github.com/googleapis/java-bigquery/issues/769)) ([49dbbba](https://www.github.com/googleapis/java-bigquery/commit/49dbbba8d1726e7277eb0ad8e168ff0a480daf0e))
-   update dependency com.google.cloud:google-cloud-storage to v1.113.1 ([#&#8203;770](https://www.github.com/googleapis/java-bigquery/issues/770)) ([34f30ec](https://www.github.com/googleapis/java-bigquery/commit/34f30ec2fea28e053fdb32d766749c8d6d0e115c))

##### Documentation

-   update clustering field docstrings ([#&#8203;774](https://www.github.com/googleapis/java-bigquery/issues/774)) ([58e2e4e](https://www.github.com/googleapis/java-bigquery/commit/58e2e4ee8c4f3bf8391bbc1e2ff07b63e6247c69))
-   **samples:** add region tag for auth snippet ([#&#8203;760](https://www.github.com/googleapis/java-bigquery/issues/760)) ([9709c9e](https://www.github.com/googleapis/java-bigquery/commit/9709c9e401a512b6ab8e3ded52420597e30c7b0c))
-   **samples:** fix flaky test case for undelete table ([#&#8203;757](https://www.github.com/googleapis/java-bigquery/issues/757)) ([85b7069](https://www.github.com/googleapis/java-bigquery/commit/85b70691cc380beeafa839be4f10ec513342389f))

</details>

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