[request] exposing some `::device` internals

I'm porting a Golang project to Rust called [yggdrasil](https://yggdrasil-network.github.io) - tl;dr, its a P2P meshnet software built on Wireguard in which your static IPv6 is derived from the hash of a public ed25519 key.

The original is built on wireguard-go and seems to rely on a slightly higher-level "device" [API](https://github.com/WireGuard/wireguard-go/blob/master/tun/tun.go) that simplifies its integration into the project, and I noticed that the most similar types and interfaces were unique to the `boringtun` binary, not library, and (unfortunately for someone of my familiarity with Rust) make extensive use of `unsafe`.

Would it be possible to expose types like `TunSocket` and even `Device` and `Peer` in the library API?