async UDP: Make accessible through lib.rs

Author: chrysn

embedded-nal-async/src/lib.rs

@@ -15,3 +15,4 @@ pub use no_std_net::{IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr, SocketAddrV4, Socke
 pub use dns::Dns;
 pub use embedded_nal::AddrType;
 pub use stack::TcpConnect;
+pub use stack::{ConnectedUdp, UnconnectedUdp, UdpStack};