feat: add default std feature

Cargo.toml

@@ -34,6 +34,10 @@ exclude = [
   "benches"
 ]
 
+[features]
+default = ["std"]
+std = []
+
 [dependencies]
 bytes = "1"
 fnv = "1.0.5"

src/lib.rs

@@ -160,6 +160,11 @@
 
 #![deny(warnings, missing_docs, missing_debug_implementations)]
 
+//#![cfg_attr(not(feature = "std"), no_std)]
+#[cfg(not(feature = "std"))]
+compile_error!("`std` feature currently required, support for `no_std` may be added later");
+
+
 #[cfg(test)]
 #[macro_use]
 extern crate doc_comment;