Bump com.google.crypto.tink:tink from 1.7.0 to 1.21.0

Bumps [com.google.crypto.tink:tink](https://github.com/tink-crypto/tink-java) from 1.7.0 to 1.21.0.
- [Release notes](https://github.com/tink-crypto/tink-java/releases)
- [Commits](https://github.com/tink-crypto/tink-java/commits/v1.21.0)

---
updated-dependencies:
- dependency-name: com.google.crypto.tink:tink
  dependency-version: 1.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -179,7 +179,7 @@
         <cs.reflections.version>0.10.2</cs.reflections.version>
         <cs.servicemix.version>3.4.4_1</cs.servicemix.version>
         <cs.servlet.version>4.0.1</cs.servlet.version>
-        <cs.tink.version>1.7.0</cs.tink.version>
+        <cs.tink.version>1.21.0</cs.tink.version>
         <cs.tomcat-embed-core.version>10.0.22</cs.tomcat-embed-core.version>
         <cs.trilead.version>build-217-jenkins-27</cs.trilead.version>
         <cs.vmware.api.version>8.0</cs.vmware.api.version>