Avoid compile tokio-uring when use default features

tokio-uring should compile only if the async-io feature is enabled

Signed-off-by: zyfjeff <[email protected]>

Author: zyfjeff

Cargo.toml

@@ -38,7 +38,7 @@ core-foundation-sys = { version = ">=0.8", optional = true }
 
 [target.'cfg(target_os = "linux")'.dependencies]
 caps = { version = "0.5", optional = true }
-tokio-uring = "0.4"
+tokio-uring = { version = "0.4.0", optional = true }
 
 [dev-dependencies]
 tokio-test = "0.4.2"