chore (Jackson): Update to Jackson '2.21.1' : https://github.com/sinch/sinch-sdk-java/security/dependabot/7

Author: JPPortier

pom.xml

@@ -60,7 +60,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <!-- 3rd party dependencies -->
-        <jackson.version>2.19.0</jackson.version>
+        <jackson.version>2.21.1</jackson.version>
         <httpclient5.version>5.2.1</httpclient5.version>
 
         <!-- tests -->