We introduced container attributes in 8.x-1.0-beta4 which where grouped and display seperately from the link attributes. This has been changed and you can find all attributes in one fieldset now.
All new commits since the last version can be found here.
Add manage display for component image to add image style,
Solving error that occurred with empty values for all components on insert,
Solving error for email component Undefined variable value,
Remove unwanted code