3.19.1 - 2021.11.03

• Added a workaround for FF26- bug where ArrayBuffers are non-extensible, but Object.isExtensible does not report it:
  • Fixed in Object.{ isExtensible, isSealed, isFrozen } and Reflect.isExtensible
  • Fixed handling of ArrayBuffers as collections keys
• Fixed Object#toString on AggregateError in IE10-
• Fixed possible lack of dependencies of WeakMap in IE8-
• .findLast methods family marked as supported from Chrome 97
• Fixed inheritance of Electron compat data web. modules
• Fixed Safari 15.1 compat data (some features were not added)
• Added iOS Safari 15.1 compat data mapping