Sourced from core-js's changelog.

3.27.1 - 2022.12.30

• Fixed a Chakra-based MS Edge (18-) bug that unfreeze (O_o) frozen arrays used as WeakMap keys
• Fixing of the previous bug also fixes some cases of String.dedent in MS Edge
• Fixed dependencies of some entries

3.27.0 - 2022.12.26

• Iterator Helpers proposal:
  • Built-ins:
    • Iterator
      • Iterator.from
      • Iterator.prototype.drop
      • Iterator.prototype.every
      • Iterator.prototype.filter
      • Iterator.prototype.find
      • Iterator.prototype.flatMap
      • Iterator.prototype.forEach
      • Iterator.prototype.map
      • Iterator.prototype.reduce
      • Iterator.prototype.some
      • Iterator.prototype.take
      • Iterator.prototype.toArray
      • Iterator.prototype.toAsync
      • Iterator.prototype[@@toStringTag]
    • AsyncIterator
      • AsyncIterator.from
      • AsyncIterator.prototype.drop
      • AsyncIterator.prototype.every
      • AsyncIterator.prototype.filter
      • AsyncIterator.prototype.find
      • AsyncIterator.prototype.flatMap
      • AsyncIterator.prototype.forEach
      • AsyncIterator.prototype.map
      • AsyncIterator.prototype.reduce
      • AsyncIterator.prototype.some
      • AsyncIterator.prototype.take
      • AsyncIterator.prototype.toArray
      • AsyncIterator.prototype[@@toStringTag]
  • Moved to Stage 3, November 2022 TC39 meeting
  • Added /actual/ entries, unconditional forced replacement disabled for features that survived to Stage 3
  • .from accept strings, .flatMap throws on strings returned from the callback, proposal-iterator-helpers/244, proposal-iterator-helpers/250
  • .from and .flatMap throws on non-object iterators, proposal-iterator-helpers/253
• Set methods proposal:
  • Built-ins:
    • Set.prototype.intersection
    • Set.prototype.union
    • Set.prototype.difference
    • Set.prototype.symmetricDifference
    • Set.prototype.isSubsetOf
    • Set.prototype.isSupersetOf
    • Set.prototype.isDisjointFrom

... (truncated)

• f44604e 3.27.1
• 98995dc add some missed dependencies to entries
• 10517de add all iterator helpers to (Async)Iterator.from entries for runtime
• 0f4a279 some stylistic changes
• da2e4f8 fix a Chakra-based MS Edge (18-) bug that unfreeze (O_o) frozen arrays used a...
• 66c427f 3.27.0
• c8322b0 allow gc disposed resources before disposing all resources of stack
• 0d9478e add some comments
• 68c9bf6 smoothed behavior of some conflicting proposals
• 4cc298a fix a couple of tests
• Additional commits viewable in compare view

This version was pushed to npm by zloirock, a new releaser for core-js since your current version.

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