chore(deps): update dependency google-cloud-datastore to v2.1.2 (#144)

[![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-datastore](https://togithub.com/googleapis/python-datastore) | `==2.1.0` -> `==2.1.2` | [![age](https://badges.renovateapi.com/packages/pypi/google-cloud-datastore/2.1.2/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/pypi/google-cloud-datastore/2.1.2/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/pypi/google-cloud-datastore/2.1.2/compatibility-slim/2.1.0)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/pypi/google-cloud-datastore/2.1.2/confidence-slim/2.1.0)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

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

### [`v2.1.2`](https://togithub.com/googleapis/python-datastore/blob/master/CHANGELOG.md#&#8203;212-httpswwwgithubcomgoogleapispython-datastorecomparev211v212-2021-05-03)

[Compare Source](https://togithub.com/googleapis/python-datastore/compare/v2.1.1...v2.1.2)

### [`v2.1.1`](https://togithub.com/googleapis/python-datastore/blob/master/CHANGELOG.md#&#8203;211-httpswwwgithubcomgoogleapispython-datastorecomparev210v211-2021-04-20)

[Compare Source](https://togithub.com/googleapis/python-datastore/compare/v2.1.0...v2.1.1)

</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-dlp).

packages/google-cloud-dlp/samples/snippets/requirements.txt

@@ -1,5 +1,5 @@
 google-cloud-dlp==3.0.1
 google-cloud-storage==1.38.0
 google-cloud-pubsub==2.4.2
-google-cloud-datastore==2.1.0
+google-cloud-datastore==2.1.2
 google-cloud-bigquery==2.16.1