deps: update dependency com.google.http-client:google-http-client-bom…

… to v1.34.2

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [com.google.http-client:google-http-client-bom](https://togithub.com/googleapis/google-http-java-client) | patch | `1.34.1` -> `1.34.2` |

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### Release Notes

<details>
<summary>googleapis/google-http-java-client</summary>

### [`v1.34.2`](https://togithub.com/googleapis/google-http-java-client/blob/master/CHANGELOG.md#&#8203;1342httpswwwgithubcomgoogleapisgoogle-http-java-clientcomparev1341v1342-2020-02-12)

[Compare Source](https://togithub.com/googleapis/google-http-java-client/compare/v1.34.1...v1.34.2)

</details>

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pom.xml

@@ -75,7 +75,7 @@
     <threeten.version>1.4.1</threeten.version>
     <javax.annotations.version>1.3.2</javax.annotations.version>
     <errorprone.version>2.3.4</errorprone.version>
-    <http-client-bom.version>1.34.1</http-client-bom.version>
+    <http-client-bom.version>1.34.2</http-client-bom.version>
     <animal-sniffer.version>1.18</animal-sniffer.version>
     <autovalue.version>1.7</autovalue.version>
     <opencensus.version>0.24.0</opencensus.version>