build(ibmcloud-core): update core sdk to use correct default url for iam calls

Author: mamoonraja

ibm_watson.gemspec

@@ -36,7 +36,7 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "eventmachine", "~> 1.2"
   spec.add_runtime_dependency "faye-websocket", "~> 0.10"
   spec.add_runtime_dependency "http", "~> 4.1.0"
-  spec.add_runtime_dependency "ibm_cloud_sdk_core", "~> 0.1.1"
+  spec.add_runtime_dependency "ibm_cloud_sdk_core", "~> 0.2.0"
 
   spec.add_development_dependency "bundler", "~> 1.16"
   spec.add_development_dependency "codecov", "~> 0.1"