feat: add array.groupByMap

[Jack-Works]

No description provided.

[Jack-Works]

That proposal also adds https://tc39.es/proposal-array-grouping/#sec-array.prototype.groupbymap but no %TypedArray%.prototype.groupBy

[zloirock]

Thanks! It's already tracked here #1001, however, I'll get some moments from this PR.

[Jack-Works]

I have removed TypedArray.groupBy

[zloirock]

@Jack-Works it's a breaking change, so it can be removed only in core-js@4.

[Jack-Works]

@Jack-Works it's a breaking change, so it can be removed only in core-js@4.

I reverted that change. Do core-js provide semver constraints even for proposals? I thought proposals are unstable

[zloirock]

Yes, sure. Breaking changes can be only in cases that most likely still no one used, like removing @@species support from Array.prototype.groupBy in #1001. Removing esnext.typed-array.group-by will break too many cases of code generated by @babel/preset-env.

[zloirock]

Published.