fix no_std compatibility (#471)

Co-authored-by: Yuki Okushi <jtitor@2k36.org>

Author: VladimirBramstedt

bytestring/CHANGES.md

@@ -1,6 +1,9 @@
 # Changes
 
 ## Unreleased - 2022-xx-xx
+- Fix no_std compatibility. [#471]
+
+[#471]: https://github.com/actix/actix-net/pull/471
 
 
 ## 1.2.0 - 2022-11-07

bytestring/Cargo.toml

@@ -18,7 +18,7 @@ name = "bytestring"
 path = "src/lib.rs"
 
 [dependencies]
-bytes = "1.2"
+bytes = { version = "1.2", default-features = false }
 serde = { version = "1.0", optional = true }
 
 [dev-dependencies]