Uipath Orchestrator API calls

Are there any changes in current API calls when we are migrating from Uipath 2018.4 to 2019.4 or 2019.10.
Are there any new API calls available in 2019.4 or 2019.10.
I went through the release notes and didn’t find anything related to API calls.

Now the orchestrator API calls includes various steps. Please follow the below link for all the details

and here is the blog which will help you in a better way