Releases

link - learn.microsoft.com/en-us/javascript/api/requirement-sets/common/add-in-commands-requirement-sets?view=common-js-preview 
link - learn.microsoft.com/en-us/javascript/api/requirement-sets/common/ribbon-api-requirement-sets?view=common-js-preview 

AddinCommands 1.3

Included the ability to include built-in commands

link - learn.microsoft.com/en-us/office/dev/add-ins/design/built-in-button-integration 
link - learn.microsoft.com/en-us/office/dev/add-ins/design/custom-tab-placement 

RibbonAPI 1.2

Adds support for contextual tabs

link - learn.microsoft.com/en-us/office/dev/add-ins/design/contextual-tabs 

RibbonAPI 1.1

Adds support to enable and disable

link - learn.microsoft.com/en-us/office/dev/add-ins/design/disable-add-in-commands 

AddinCommands 1.2

There is no AddinCommands 2.0 requirement set.

AddinCommands 1.1

Included the ability to autoopen a taskpane when a document opens.
Supported on the following platforms:
Office 365 (windows), build 8121.1+ - Excel, Word, PowerPoint, Outlook

AddinCommands 1.0

There is no AddinCommands 1.0 requirement set.
Supported on the following platforms:
Office 2016, build 16.0.6769+ - Excel, Word, PowerPoint
Office 2016, build 16.0.4678+ - Outlook
Office 365 (windows), build 6769+ - Excel, Word, PowerPoint, Outlook

link - developer.microsoft.com/en-us/office/blogs/introducing-add-in-commands/ 
link - developer.microsoft.com/en-us/office/blogs/make-your-add-ins-available-in-the-office-ribbon/