Add badges

README.md

@@ -1,3 +1,7 @@
+[![Crates.io](https://img.shields.io/crates/d/serde-wasm-bindgen?logo=rust)](https://crates.io/crates/serde-wasm-bindgen)
+[![docs.rs](https://img.shields.io/docsrs/serde-wasm-bindgen)](https://docs.rs/serde-wasm-bindgen/)
+[![GitHub Sponsors](https://img.shields.io/github/sponsors/rreverser)](https://github.com/sponsors/RReverser)
+
 This is a native integration of [Serde](https://serde.rs/) with [wasm-bindgen](https://github.com/rustwasm/wasm-bindgen). It allows to convert Rust data types into native JavaScript types and vice versa.
 
 Initially this library was created while working for [@Cloudflare](https://github.com/cloudflare) as [an alternative implementation](https://github.com/rustwasm/wasm-bindgen/issues/1258) to the JSON-based Serde support built into the `wasm-bindgen` but, [nowadays](https://github.com/rustwasm/wasm-bindgen/pull/3031) `serde-wasm-bindgen` is the officially preferred approach. It provides much smaller code size overhead than JSON, and, in most common cases, provides much faster serialization/deserialization as well.