It's internal nowadays

It's not doing much for us any more, mostly just noise.

* Update tests for a new wasmprinter release

* Update more tests

* More tests to update

PR #2656 added support settings `type` and `request_credentials` on
`WorkerOptions`. However, the `WorkerType` struct` was not exposed, as
the feature was not added to Cargo.toml.

* Generate TypeScript return types for `async` functions

* Fix tests to respect returning only `Result<T, JsValue>`

* Fix smoke test

* add `simple_async_fn` to `typescript-tests`

* cleanup and set JsDoc comment correctly for `Promise<void>`

* clean up now that `ts_ret_ty` is complete w/ Promise

* add `.d.ts` reference tests

* add async reference tests

* don't test `.js` and `.wat` in async reference tests

* Allow accessing JS math operators from Rust

Useful for dealing with JS `BigInt`s

* Add `typeof` and `in` methods/intrinsics

* Add comparison operators

* Remove Object.is intrinsic

* Make conversion into f64 faillible

* Add `#[inline]`s

* Fix methods to make them take references

* cargo fmt

* Add BigInt to js-sys (no constructor yet)

* Remove useless import

* Fix UI tests

* Add BigInt constructor

* Allow catching `to_string` method for BigInt

* Fix tests again

* Add inlines

* Rework PartialEq impl

* Implement FromStr for BigInt

* Add more inlines

* Update formatting

* Add more trait impls and feature for integration with `rust-num`

* Add `PartialOrd` and `Ord` impls for more types

* Cargo fmt

* Remove `num-traits` from `wasm-bindgen`, integrate `js-sys` with `rust-num` further

* Update Cargo.toml

* Update Rust version for CI (to allow proc-macro2 to build again)

* Fix link in Markdown

* Remove all `rust-num` code from `js-sys`

… again (#2674)