On the website iced - Rust, the current version of Iced is listed as 0.12.0. However, when attempting to update to this specified version, Cargo is unable to select a suitable version from the available candidates. The latest version on GitHub is 0.10.0. Crates.io also indicates version 0.10.0. How can I obtain version 0.12.0 of Iced?
The documentation you are linking is generated from the latest push to the master branch. 0.12 has not been released yet.
If you want to rely on the unreleased changes, you can use the GitHub source directly:
iced = { git = "https://github.com/iced-rs/iced.git" }
Just keep in mind, here be dragons.