Fix incompatibility with js-sys 0.3.70

[fornwall]

Fixes #617.

[gmemstr]

@fornwall I tried to do the same in #618 but it didn't work out - some of the underlying types changed a bit more than expected. Worth runing cargo check locally.

[andrewdavidmackenzie]

Is this going to be merged any time soon (and a release with the fix published)?

My project that uses workers is failing due to this one.

I guess I'll implement one of the workarounds mentioned, but wanted to know what the timing on the "real" fix might be.

Thanks

[kflansburg]

Is this going to be merged any time soon (and a release with the fix published)?

My project that uses workers is failing due to this one.

I guess I'll implement one of the workarounds mentioned, but wanted to know what the timing on the "real" fix might be.

Thanks

This was broken in the upstream crate, and I would like to see their response to the issue first. If we merge this, and they revert / yank the breaking change, then it will be broken again. If we pin the crate for now, I suspect that will not entirely solve the problem as others are running into conflicts when using the pinned version with other crates.

[kflansburg]

Closing in favor of #621