Support for wasm_bindgen

[jpochyla]

Hi! What do you think about benchmarking in WASM browser environment? This is something that criterion lacks, currently.

[nvzqz]

Now that #70 by @dragostis landed, we're a step closer to benchmarking in-browser. However, there still hasn't been design work done to make this be a straightforward experience.

I'd love it if someone could champion this feature by helping design and implement it.