Linus Groh f952db1a1f LibWeb: Implement PromiseRejectionEvent ...

This paves the way for the rejectionhandled and unhandledrejection
events.

It's also used by core-js (in browsers, at least) to check whether
Promise needs to be polyfilled, so adding it should allow more websites
to leverage LibJS's native Promise implementation :^)

2021-10-11 13:30:17 +01:00

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