v1.0.4 of flutter_inappwebview_forge_web

Web implementation of the flutter_inappwebview_forge plugin. Changelog excerpt: - Convert JavaScript `nativeCommunication`view IDs and argument lists to Dart primitives so iframe callbacks work under Flutter web WASM (`dart2wasm`) ([#2811](https://github.com/pichillilorenzo/flutter_inappwebview/issues/2811)). - Load `web_support.js`from the Web example `index.html`so the JavaScript bridge is…