chore: replace futures dependency with futures_util (#265)

Removes loads of dependencies for dependent libraries.

Author: Icelk

Cargo.toml

@@ -23,7 +23,7 @@ libc = "0.2.80"
 io-uring = "0.5.13"
 socket2 = { version = "0.4.4", features = ["all"] }
 bytes = { version = "1.0", optional = true }
-futures = "0.3.26"
+futures-util = { version = "0.3.26", default-features = false, features = ["std"] }
 
 [dev-dependencies]
 tempfile = "3.2.0"

src/fs/create_dir_all.rs

@@ -1,4 +1,4 @@
-use futures::future::LocalBoxFuture;
+use futures_util::future::LocalBoxFuture;
 use std::io;
 use std::path::Path;