chore(deps): update dependency google-auth to ~=2.2.0 (#291)
chore(deps): update dependency google-auth to ~=2.2.0 (#291)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-auth](https://togithub.com/googleapis/google-auth-library-python) | `~=2.1.0` -> `~=2.2.0` | [![age](https://badges.renovateapi.com/packages/pypi/google-auth/2.2.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-auth/2.2.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-auth/2.2.0/compatibility-slim/2.1.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-auth/2.2.0/confidence-slim/2.1.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>googleapis/google-auth-library-python</summary>

### [`v2.2.0`](https://togithub.com/googleapis/google-auth-library-python/blob/master/CHANGELOG.md#&#8203;220-httpswwwgithubcomgoogleapisgoogle-auth-library-pythoncomparev210v220-2021-09-21)

[Compare Source](https://togithub.com/googleapis/google-auth-library-python/compare/v2.1.0...v2.2.0)

##### Features

-   add support for workforce pool credentials ([#&#8203;868](https://www.togithub.com/googleapis/google-auth-library-python/issues/868)) ([993bab2](https://www.github.com/googleapis/google-auth-library-python/commit/993bab2aaacf3034e09d9f0f25d36c0e815d3a29))

</details>

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