web-api-cat 0.7.6

Bindings between boa-cat (JS engine) and the DOM (html-cat tree) plus fetch (net-cat). v0.7.6 adds capture-phase support to the event system: `addEventListener(type, callback, useCapture)` / `addEventListener(type, callback, { capture: true })` register a capture listener; `dispatchEvent` now walks three spec-mandated phases (CAPTURE root->target's-parent, AT_TARGET, BUBBLE target's-parent->root). `removeEventListener` respects the capture flag for matching. Seventh sub-crate of a Servo-replacement webview runtime targeting Tauri.