feat(watson-version): update watsonVersion to 9.0.2

Author: kevinkowa

gradle.properties

@@ -1,5 +1,5 @@
 version=2.1.4
 group = com.ibm.watson.developer_cloud
-watsonVersion = 8.6.3
+watsonVersion = 9.0.2
 springVersion = 5.1.13.RELEASE
 springBootVersion = 2.2.0.RELEASE