Release master with react/promise 2.*

[zluiten]

Since #33 react/promise v2 is supported. Can this be officially released?

[OndraM]

Yes please, could we get a new tagged version? Cc @cboden @igorw

Thanks :-)

[OndraM]

With recent merge of the new close event, would you please consider tagging a new release? Would be perfect for us!

cc @WyriHaximus

[WyriHaximus]

@OndraM looking into that now, but first figuring out the promise version bump