Workflow Module support added

• Bug Fix
  • Release Items update bug fixed
• Enhancement
  • Request concurrency added in SDK
• New Feature
  • Workflow module support added

Request faiilure

Retry count on request failure issue fixed

Bug fixes for owner of organisation accessing stack instance

Merge pull request #2 from contentstack/development

Bug fixed for Organization accessing stack instance

Initial release

• Initial release for Contentstack CMA base JS management SDK