wasm-bindgen 0.2.55

Easy support for interacting between JS and Rust.
Documentation 
steps:
  - script: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh -s -- -f
    displayName: "install wasm-pack"
  - script: |
      set -ex
      cargo build -p wasm-bindgen-cli
      ln -snf `pwd`/target/debug/wasm-bindgen $(dirname `which cargo`)/wasm-bindgen
    displayName: "install wasm-bindgen for `wasm-pack` to use"