Merge pull request #557 from jenkinsci/dependabot/maven/org.jenkins-ci.plugins-timestamper-1.22

Bump timestamper from 1.20 to 1.22

Author: uhafner

plugin/pom.xml

@@ -326,7 +326,7 @@
  <dependency>
  <groupId>org.jenkins-ci.plugins</groupId>
  <artifactId>timestamper</artifactId>
- <version>1.20</version>
+ <version>1.22</version>
  <scope>test</scope>
  </dependency>