chore(deps): update dependency google-cloud-storage to v1.42.3 (#219)

[![WhiteSource Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [google-cloud-storage](https://github.com/googleapis/python-storage) | `==1.42.2` -> `==1.42.3` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-storage/1.42.3/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-storage/1.42.3/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-storage/1.42.3/compatibility-slim/1.42.2)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-storage/1.42.3/confidence-slim/1.42.2)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v1.42.3`](https://github.com/googleapis/python-storage/blob/master/CHANGELOG.md#&#8203;1423-httpswwwgithubcomgoogleapispython-storagecomparev1422v1423-2021-09-30)

[Compare Source](https://github.com/googleapis/python-storage/compare/v1.42.2...v1.42.3)

</details>

---

### Configuration

📅 **Schedule**: At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box.

---

This PR has been generated by [WhiteSource Renovate](https://renovate.whitesourcesoftware.com). View repository job log [here](https://app.renovatebot.com/dashboard#github/googleapis/python-documentai).

document_ai/snippets/requirements.txt

@@ -1,2 +1,2 @@
 google-cloud-documentai==1.0.0
-google-cloud-storage==1.42.2
+google-cloud-storage==1.42.3