Merge pull request #34 from nullstalgia/fix/docsrs/docs_auto_cfg_deprecation

Fix docs.rs build, don't use deprecated nightly feature

Author: zesterer

src/lib.rs

@@ -1,5 +1,5 @@
 #![doc = include_str!("../README.md")]
-#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+#![cfg_attr(docsrs, feature(doc_cfg))]
 
 use std::{
     future::{Future, IntoFuture},