[Snyk] Security upgrade com.google.protobuf:protobuf-java from 3.4.0 to 3.16.1

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `maven` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • src/it/setup-protoc-plugin/pom.xml

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity	Reachability
	575/1000 Why? Recently disclosed, Has a fix available, CVSS 7.5	Denial of Service (DoS) SNYK-JAVA-COMGOOGLEPROTOBUF-2331703	com.google.protobuf:protobuf-java: 3.4.0 -> 3.16.1	No	No Known Exploit	No Path Found

(*) Note that the real score may have changed since the PR was raised.

Check the changes in this PR to ensure they won't cause issues with your project.

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