New built-in lib types in TS 5.5/5.6/5.8: Array.fromAsync, Iterator helpers, Set algebra, Map.groupBy/Object.groupBy, Error.isError, regex v flag.
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What's new to type in TypeScript 5.5+ libs — `Array.fromAsync`, `Set` methods, `Iterator` helpers?
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Dossier 36 of 70 decoded in the TypeScript track. One more won't hurt.