String#replaceAll moved to the stable ES, per June TC39 meeting Promise.any and AggregateError moved to the stable ES, per July TC39 meeting Added Reflect[@@toStringTag], per July TC39 meeting Forced replacement of Array#{ reduce, reduceRight } in Chrome 80-82 because of a bug, #766 Following the changes in the upsert proposal, { Map, WeakMap }#emplace replace { Map, WeakMap }#upsert, these obsole