Feature request: add a WASM target

[ZacSweers]

Even if it's just experimental, would be helpful for applications that are testing support and use clikt

[ajalt]

So I looked into this and it seems that the wasm source set is somehow a dependency of the js source set, so jsTest fails to configure. If you know of some workaround, let me know.

Once kotest adds a wasm target, I'll try again. That probably won't happen until coroutines has a stable release with wasm support, though.