docs(http-body-util): show cfgs (#151)

Author: ikrivosheev

http-body-util/Cargo.toml

@@ -44,3 +44,7 @@ tokio = { version = "1", features = ["sync"], optional = true }
 [dev-dependencies]
 futures-util = { version = "0.3", default-features = false }
 tokio = { version = "1", features = ["macros", "rt", "sync", "rt-multi-thread"] }
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]

http-body-util/src/lib.rs

@@ -1,5 +1,6 @@
 #![deny(missing_debug_implementations, missing_docs, unreachable_pub)]
 #![cfg_attr(test, deny(warnings))]
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
 
 //! Utilities for [`http_body::Body`].
 //!