Bump stream Java client to 0.21.0

References #178

Author: acogoluegnes

pom.xml

@@ -45,7 +45,7 @@
   </scm>
 
   <properties>
-    <stream-client.version>0.21.0-SNAPSHOT</stream-client.version>
+    <stream-client.version>0.21.0</stream-client.version>
     <slf4j.version>2.0.16</slf4j.version>
     <logback.version>1.5.12</logback.version>
     <netty.version>4.1.115.Final</netty.version>