Updating nannou
You can update to a new version of nannou by editing your Cargo.toml file to
use the new crate. For version 0.19 add the line
nannou = "0.19"
Then within the nannou directory run the following to update all dependencies:
cargo update
Updating Rust.
From time to time, a nannou update might require features from a newer version of rustc. For example, nannou 0.19 uses the Rust 2024 edition and requires a recent stable toolchain. In these cases, you can update your rust toolchain to the latest version by running the following:
rustup update