fix some unused_crate_dependencies lint warns

Signed-off-by: June Strawberry <june@vern.cc>

src/api/mod.rs

@@ -5,6 +5,8 @@ pub mod client;
 pub mod router;
 pub mod server;
 
+use log as _;
+
 pub(crate) use self::router::{Ruma, RumaResponse, State};
 
 tuwunel_core::mod_ctor! {}