Shadow DOM support for Ember

[itsjwala]

Discussed in #704

^{Originally posted by c69-addepar January 25, 2023}
Hi Team, @itsjwala ,

since 1.19.0-alpha.0, @percy/cli now supports Shadow DOM.

Unfortunately, the changes in that repo alone are not enough to enable support for Ember apps. See percy/cli#1165 (comment)

Happy to provide more details if needed.

CC: @mmun @aschenoni

[c69-addepar]

Thank you so much @itsjwala ! We have confirmed that @percy/cli 1.19.2 + @percy/ember 4.0.2 work well with our code.

This allowed us to remove the fork of 1.0.3, and switch back to mainline Percy! 🎉