Switch serde dependency to serde_core (#728)

Author: paolobarbolini

Cargo.lock

@@ -3,6 +3,7 @@
 ## Unreleased
 
 - Minimum supported Rust version (MSRV) is now 1.75.
+- Switch `serde` to `serde_core`
 
 ## 1.4.0
 

bytestring/CHANGES.md

@@ -16,12 +16,15 @@ allowed_external_types = ["bytes::*", "serde::*"]
 
 [dependencies]
 bytes = { version = "1.2", default-features = false }
-serde = { version = "1", optional = true }
+serde_core = { version = "1.0.221", optional = true }
 
 [dev-dependencies]
 ahash = { version = "0.8", default-features = false }
 serde_json = "1"
 static_assertions = "1.1"
 
+[features]
+serde = ["dep:serde_core"]
+
 [lints]
 workspace = true

bytestring/Cargo.toml

@@ -275,7 +275,7 @@ impl fmt::Display for ByteString {
 mod serde {
     use alloc::string::String;
 
-    use serde::{
+    use serde_core::{
         de::{Deserialize, Deserializer},
         ser::{Serialize, Serializer},
     };
@@ -304,7 +304,7 @@ mod serde {
 
     #[cfg(test)]
     mod serde_impl_tests {
-        use serde::de::DeserializeOwned;
+        use serde_core::de::DeserializeOwned;
         use static_assertions::assert_impl_all;
 
         use super::*;