fix: update core gem to show transaction id in error message

Author: mamoonraja

README.md

@@ -268,8 +268,8 @@ Result: "<response returned by service>"
 ```
 
 ### Transaction IDs
-Every SDK call will return a response which will contain a transaction ID, accessible via the `x-global-transaction-id` header. This transaction ID is useful for troubleshooting and accessing relevant logs from your service instance.
 
+Every SDK call will return a response which will contain a transaction ID, accessible via the `x-global-transaction-id` header. This transaction ID is useful for troubleshooting and accessing relevant logs from your service instance.
 
 ```ruby
 require "ibm_watson"
@@ -280,11 +280,13 @@ assistant = AssistantV1.new(
   version: "2017-04-21"
 )
 
-response = assistant.headers(
-  "Custom-Header" => "custom_value"
-  ).list_workspaces
-
-p "Global Transaction Id: #{response.headers["X-Global-Transaction-Id"]}"
+begin
+  response = assistant.list_workspaces
+  p "Global transaction id: #{response.headers["X-Global-Transaction-Id"]}"
+rescue IBMCloudSdkCore::ApiException => e
+  # Global transaction on failed api call is contained in the error message
+  print "Error: ##{e}"
+end
 ```
 
 ## Configuring the HTTP client

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", "~> 1.1"
+  spec.add_runtime_dependency "ibm_cloud_sdk_core", "~> 1.1.1"
   spec.add_runtime_dependency "jwt", "~> 2.2.1"
 
   spec.add_development_dependency "bundler", "~> 1.16"