wasm-pack build flag docs out of date

[twilco]

🐛 Bug description

https://rustwasm.github.io/wasm-pack/book/commands/build.html#profile

The section of this book describes three flags: --dev, --profiling, and --release, all of which result in this errored output:

$ wasm-pack build --release  
error: Found argument '--release' which wasn't expected, or isn't valid in this context

USAGE:
    wasm-pack build [FLAGS] [OPTIONS] [path]

For more information try --help

It looks like --debug is the only flag that does anything currently - no flag seems to build for release by default.

🤔 Expected Behavior

The documentation matches the behavior of the tool.

👟 Steps to reproduce

Run wasm-pack with each command and note the output.

🌍 Your environment

Include the relevant details of your environment.
wasm-pack version: 0.5.1
rustc version: rustc 1.31.0 (abe02cefd 2018-12-04)

Thanks for your work on this awesome tool!

[drager]

Yeah, the docs are built from master and that behavior was added in #440 which targets the 0.6.0 milestone which hasn't been released yet. This means that 0.5.1 doesn't have this feature.

I think the docs at https://rustwasm.github.io/wasm-pack/book/ should be generated for multiple versions (like docs.rs does), so we can have docs for master, latest stable as well as older releases.

[twilco]

Got it, thanks. Any idea when 0.6.0 will be coming?

[drager]

Not really, sorry. I think @ashleygwilliams should be able to answer that though.

[ashleygwilliams]

I will be working on a release starting tomorrow, so should be sometime this week! So sorry for the delay! The Rust 2018 Edition kinda took over a bunch of my time. Now that that is over you should see both dev and release work in this pick up significantly. Sorry again!

[twilco]

No need to be sorry! Thanks for all your hard work.