Add boxed transport (#81)

Author: rklaehn

Cargo.toml

@@ -32,6 +32,7 @@ quinn-udp = { package = "iroh-quinn-udp", version = "0.4.0", optional = true }
 interprocess = { version = "2.1", features = ["tokio"], optional = true }
 hex = "0.4.3"
 futures = { version = "0.3.30", optional = true }
+anyhow = "1.0.73"
 
 [dependencies.educe]
 # This is an unused dependency, it is needed to make the minimal