deps: update dependency com.google.cloud:google-cloud-memcache-bom to v0.2.1 (#784)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-memcache-bom](https://github.com/googleapis/java-memcache) | patch | `0.2.0` -> `0.2.1` |

---

### Release Notes

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

### [`v0.2.1`](https://github.com/googleapis/java-memcache/blob/master/CHANGELOG.md#&#8203;021-httpswwwgithubcomgoogleapisjava-memcachecomparev020v021-2020-08-07)

[Compare Source](https://github.com/googleapis/java-memcache/compare/v0.2.0...v0.2.1)

</details>

---

### Renovate configuration

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

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

:recycle: **Rebasing**: Renovate will not automatically rebase this PR, because other commits have been found.

:no_bell: **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#googleapis/java-cloud-bom).

Author: renovate-bot

pom.xml

@@ -420,7 +420,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-memcache-bom</artifactId>
-        <version>0.2.0</version>
+        <version>0.2.1</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>