ListItemStyle missing #18
Description
Hi there,
Apple has added a List Item Style
https://developer.apple.com/library/content/documentation/General/Conceptual/Apple_News_Format_Ref/ListItemStyle.html#//apple_ref/doc/uid/TP40015408-CH112-SW1
which isn't present in the API.
It's used in TestStyle:
https://developer.apple.com/library/content/documentation/General/Conceptual/Apple_News_Format_Ref/TextStyle.html#//apple_ref/doc/uid/TP40015408-CH77-SW1
Should I make a pull request with those added ?