feat(java-sdk-version): update on java-sdk version

Author: kevinkowa

gradle.properties

@@ -1,5 +1,5 @@
 version=2.0.0
 group = com.ibm.watson.developer_cloud
-watsonVersion = 8.3.1
+watsonVersion = 8.6.0
 springVersion = 5.1.13.RELEASE
 springBootVersion = 2.1.12.RELEASE