docs: Add link to rustdocs for master to README

README.md

@@ -4,6 +4,7 @@
 [![dependency status](https://deps.rs/repo/github/libp2p/rust-libp2p/status.svg?style=flat-square)](https://deps.rs/repo/github/libp2p/rust-libp2p)
 [![Crates.io](https://img.shields.io/crates/v/libp2p.svg)](https://crates.io/crates/libp2p)
 [![docs.rs](https://img.shields.io/badge/api-rustdoc-blue.svg)](https://docs.rs/libp2p)
+[![docs.rs master](https://img.shields.io/badge/docs-master-blueviolet)](https://libp2p.github.io/rust-libp2p/libp2p/)
 
 This repository is the central place for Rust development of the [libp2p](https://libp2p.io) spec.
 

src/lib.rs

@@ -18,6 +18,9 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
+// Remove this note before publishing
+//! # ⚠️ WARNING You are viewing the master docs
+//!
 //! libp2p is a modular peer-to-peer networking framework.
 //!
 //! To learn more about the general libp2p multi-language framework visit