deps: update dependency com.google.cloud:google-cloud-iot-bom to v1.1…

….6 (#1114)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.cloud:google-cloud-iot-bom](https://togithub.com/googleapis/java-iot) | patch | `1.1.5` -> `1.1.6` |

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### Release Notes

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

### [`v1.1.6`](https://togithub.com/googleapis/java-iot/blob/master/CHANGELOG.md#&#8203;116-httpswwwgithubcomgoogleapisjava-iotcomparev115v116-2020-11-02)

[Compare Source](https://togithub.com/googleapis/java-iot/compare/v1.1.5...v1.1.6)

</details>

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pom.xml

@@ -353,7 +353,7 @@
       <dependency>
         <groupId>com.google.cloud</groupId>
         <artifactId>google-cloud-iot-bom</artifactId>
-        <version>1.1.5</version>
+        <version>1.1.6</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>