chore: prepare for release (#5)

Add missing stuff needed for release.

Author: SteveLauC

Cargo.toml

@@ -3,6 +3,8 @@ name = "monoio-duplex"
 version = "0.1.0"
 edition = "2021"
 description = "Port of Tokio's SimplexStream and DuplexStream for Monoio"
+license = "MIT"
+repository = "https://github.com/SteveLauC/monoio-duplex"
 
 [dependencies]
 async-lock = "3.4.0"

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) Project Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,5 +1,10 @@
 # monoio-duplex
 
+[![crates.io](https://img.shields.io/crates/v/monoio-duplex?style=flat-square&logo=rust)](https://crates.io/crates/monoio-duplex)
+[![docs.rs](https://img.shields.io/badge/docs.rs-monoio-duplex-blue?style=flat-square&logo=docs.rs)](https://docs.rs/monoio-duplex)
+[![BUILD](https://github.com/stevelauc/monoio-duplex/workflows/ci/badge.svg)](https://github.com/stevelauc/monoio-duplex/actions/workflows/ci.yml)
+![Crates.io](https://img.shields.io/crates/d/monoio-duplex?color=orange)
+
 Port of Tokio's [`SimplexStream`][simplex] and [`DuplexStream`][duplex] for 
 [Monoio].