v3.108.0

• update Intl.* config's. fixes #1094 #1094
• Serve IntersectionObserver to all iOS Safari versions #1082
• Update guidate for Intl.PluralRules to mention locales have no subtags #650
• skip older IE for WPT tests 3bb57e4
• add more tests and a few more EventTarget interface features c844665
• fixes dca1723