16.0.0
Breaking changes:
- Made 
[Exposed]required, per the Web IDL specification. - Made the 
globalNamessecond argument toinstall()required, instead of having it default to["Window"]. - Aligned with the Web IDL specification's legacy extended attribute renames: 
[LenientThis]→[LegacyLenientThis];[NoInterfaceObject]→[LegacyNoInterfaceObject];[TreatNullAs=EmptyString]→[LegacyNullToEmptyString];[OverrideBuiltins]→[LegacyOverrideBuiltins]; and[Unforgeable]→[LegacyUnforgeable]. - Removed 
[LegacyArrayClass]support, as it was removed from the Web IDL specification. 
Additions:
Fixes:
- Fixed promise-typed operations and attributes to always return promises, including for thisArg or argument conversion errors.
 - Fixed conversion of non-string values to enumeration types. Now 
{ toString() { return "foo" } }will be properly treated the same as"foo"in such cases. - Fixed 
[LegacyLenientThis], which previously generated code which would not actually allow invalid thisArg values. (#210, @ExE-Boss) - Fixed 
new()to work for legacy platform objects; previously the generated code would try to reassign aconstvariable.