Typescript 4.2.2 support

[mmso]

With the latest dom definitions in TypeScript, some types have been removed such as UnderlyingByteSource, ReadableStreamBYOBReader, or ReadableByteStreamController microsoft/TypeScript#42067

This causes a compilation error if library checking is enabled.

[MattiasBuelens]

Riiight, I had updated the Stream DOM types a while back in microsoft/TypeScript-DOM-lib-generator#890, and kind of forgot about it. But now that TypeScript 4.2 is out, those new types have landed as well. So I'm breaking my own projects again. 😅

I'll have a look.

[lgrahl]

Hoping a polite ping is appropriate and many thanks for this project. 🙂

[MattiasBuelens]

Found some time to finish this up. Published as v0.1.0. 🙂

Note that, although the "alpha" status is now gone, this is still very much a v0.x project. But at least it's somewhat usable already. 😁