chore: release 0.120.6 (#293)

🤖 I have created a release \*beep\* \*boop\* 
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### [0.120.6](https://www.github.com/googleapis/java-errorreporting/compare/v0.120.5...v0.120.6) (2020-10-31)


### Dependencies

* update dependency com.google.cloud:google-cloud-shared-dependencies to v0.14.1 ([#292](https://www.github.com/googleapis/java-errorreporting/issues/292)) ([32a4db2](https://www.github.com/googleapis/java-errorreporting/commit/32a4db2c3ebedbae2b75db181ec9bf96c3bcc03f))
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This PR was generated with [Release Please](https://github.com/googleapis/release-please).

errorreporting/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-errorreporting</artifactId>
-      <version>0.120.6-beta-SNAPSHOT</version>
+      <version>0.120.6-beta</version>
     </dependency>
     <!-- {x-version-update-end} -->