tauri-runtime-servocat 3.16.0

Servo-replacement runtime for Tauri: wires html-cat, css-cat, dom-cat, layout-cat, paint-cat, net-cat, boa-cat, ecma-runtime-cat, and web-api-cat into a single rendering + scripting pipeline. v3.16.0 closes the parser cascade: bumps to boa-cat 0.7 + ecma-runtime-cat 0.3.1 + web-api-cat 0.6 + ecma-parse-cat 0.3 so user-supplied webview scripts accept natural async syntax (`async () => body`, `async function foo() { ... }`) and reserved-word member access (`obj.catch(cb)`). The async-arc behaviour from v3.15 is unchanged.
//! Demo binary: renders a small HTML page and shows it in a window.
//!
//! Run with `cargo run --bin demo`.  Close the window to exit.

use tauri_runtime_servocat::{Error, Viewport, render, run_window};

const HTML: &str = "<html><body>\
<h1>tauri-runtime-servocat</h1>\
<p>cosmic-text glyph raster, presented through a softbuffer window.</p>\
<p>close the window to exit.</p>\
</body></html>";

const CSS: &str = "
    body { background-color: white; padding: 24px; }
    h1 { color: navy; height: 48px; }
    p { color: black; height: 28px; }
";

fn main() -> Result<(), Error> {
    let viewport = Viewport::new(640, 480);
    let frame = render(HTML, CSS, viewport)?;
    run_window(frame, viewport)
}