Publish the latest criterion book

[danking]

Hi there!

Thanks for building my favorite benchmarking tool! I noticed the book page about criterion still recommends the alpha version which has some bugs on macOS. Is it possible to release the latest version of the book (what's on the current master branch?)

https://bheisler.github.io/criterion.rs/book/cargo_criterion/cargo_criterion.html

[hkBst]

The book also advises to use version 0.3 while 0.6 is out: https://bheisler.github.io/criterion.rs/book/user_guide/migrating_from_libtest.html.