This is a large release. After > 4 years, rust-libp2p ships with an (alpha) QUIC implementation. The necessary TLS logic is extracted into its own crate, and can thus be used detached from QUIC, e.g. on top of TCP as an alternative to Noise. In addition to these two transports, this release adds a third, namely WebRTC (browser-to-server). But that is definitely not it. See below for the many other changes packed into this release.

See individual changelogs for details.

Thanks to the many folks involved!