We’ve written a blog post summarizing the changes in this release: https://crystal-lang.org/2020/06/09/crystal-0.35.0-released.html
The full changelog is here: https://github.com/crystal-lang/crystal/releases/tag/0.35.0
This release includes shards v0.11.1. Relevant changes can be found at https://github.com/crystal-lang/shards/releases/tag/v0.11.0
All the usual installation methods still apply: https://crystal-lang.org/install/
Docker images and 64 bits Linux packages are available as usual
The brew formula PR is in https://github.com/Homebrew/homebrew-core/pull/56013
In https://crystal-lang.org/api/ you will now be able to jump between older versions of the API.