Issue 285: Prepare Schema Registry for 0.6 release (#286) (#288)

Cherry pick PR #286 to r0.6.

Signed-off-by: Shashwat Sharma <[email protected]>

gradle.properties

@@ -49,13 +49,13 @@ avroVersion=1.11.1
 avroProtobufVersion=1.10.2
 snappyVersion=1.1.7.3
 javaxActivationVersion=1.1.1
-pravegaVersion=0.12.0
-pravegaKeyCloakVersion=0.12.0
+pravegaVersion=0.13.0
+pravegaKeyCloakVersion=0.13.0
 apacheZookeeperVersion=3.6.3
 snakeYamlVersion=2.0
 
 # Version and base tags can be overridden at build time
-schemaregistryVersion=0.6.0-SNAPSHOT
+schemaregistryVersion=0.6.0
 schemaregistryBaseTag=pravega/schemaregistry
 
 # Pravega Signing Key