libp2p-webtransport-websys 0.4.0

WebTransport for libp2p under WASM environment
Documentation
## 0.4.0

- Implement refactored `Transport`.
  See [PR 4568]https://github.com/libp2p/rust-libp2p/pull/4568

## 0.3.0

* Fix unhandled exceptions thrown when calling `Webtransport::close`.
  See [PR 5390]https://github.com/libp2p/rust-libp2p/pull/5390.
* Change logs to debug level.
  See [PR 5396]https://github.com/libp2p/rust-libp2p/pull/5396.


## 0.2.0


## 0.1.0

* Initial implementation of WebTranport transport using web-sys bindings. See [PR 4015].

[PR 4015]: https://github.com/libp2p/rust-libp2p/pull/4015