fix: vec! macro enabled only for test module

base58/src/lib.rs

@@ -18,7 +18,6 @@
 #![allow(clippy::needless_question_mark)] // https://github.com/rust-bitcoin/rust-bitcoin/pull/2134
 #![allow(clippy::manual_range_contains)] // More readable than clippy's format.
 
-#[macro_use]
 extern crate alloc;
 
 #[cfg(bench)]
@@ -248,6 +247,7 @@ where
 
 #[cfg(test)]
 mod tests {
+    use alloc::vec;
     use hex::test_hex_unwrap as hex;
 
     use super::*;