deps: update dependency com.google.cloud:google-cloud-pubsub to v1.112.5 (#832)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-pubsub](https://togithub.com/googleapis/java-pubsub) | `1.112.3` -> `1.112.5` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.112.5/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.112.5/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.112.5/compatibility-slim/1.112.3)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-pubsub/1.112.5/confidence-slim/1.112.3)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

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

### [`v1.112.5`](https://togithub.com/googleapis/java-pubsub/blob/master/CHANGELOG.md#&#8203;11125-httpswwwgithubcomgoogleapisjava-pubsubcomparev11124v11125-2021-05-14)

[Compare Source](https://togithub.com/googleapis/java-pubsub/compare/v1.112.4...v1.112.5)

### [`v1.112.4`](https://togithub.com/googleapis/java-pubsub/blob/master/CHANGELOG.md#&#8203;11124-httpswwwgithubcomgoogleapisjava-pubsubcomparev11123v11124-2021-05-12)

[Compare Source](https://togithub.com/googleapis/java-pubsub/compare/v1.112.3...v1.112.4)

</details>

---

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Author: renovate-bot

samples/install-without-bom/pom.xml

@@ -59,7 +59,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.112.3</version>
+      <version>1.112.5</version>
       <scope>test</scope>
     </dependency>
   </dependencies>

samples/snapshot/pom.xml

@@ -59,7 +59,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.112.3</version>
+      <version>1.112.5</version>
       <scope>test</scope>
     </dependency>
   </dependencies>

samples/snippets/pom.xml

@@ -71,7 +71,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-pubsub</artifactId>
-      <version>1.112.3</version>
+      <version>1.112.5</version>
       <scope>test</scope>
     </dependency>
   </dependencies>