chore: release 2.2.1 (#335)

🤖 I have created a release \*beep\* \*boop\* 
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### [2.2.1](https://github.com/googleapis/java-dlp/compare/v2.2.0...v2.2.1) (2020-10-31)


### Dependencies

* update dependency com.google.cloud:google-cloud-shared-dependencies to v0.14.1 ([#332](https://github.com/googleapis/java-dlp/issues/332)) ([7dd78c4](https://github.com/googleapis/java-dlp/commit/7dd78c4b65b8948a9a9e3158c44c44f3617d5f25))
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This PR was generated with [Release Please](https://github.com/googleapis/release-please).

dlp/snippets/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-dlp</artifactId>
-      <version>2.2.1-SNAPSHOT</version>
+      <version>2.2.1</version>
     </dependency>
     <!-- {x-version-update-end} -->