Fork TS Checker Async Overlay Webpack Plugin

A webpack plugin that connects fork-ts-checker-webpack-plugin (with async: true) to the error overlay of webpack-dev-server. Version 0.4.0 is the latest stable release. The plugin addresses the limitation that type checking errors from fork-ts-checker-webpack-plugin are not shown in the dev server overlay when running asynchronously (async: true). It works by re-firing the webpack-dev-server's done hook after type checking completes, but only if there are errors, to avoid unnecessary page reloads. It requires fork-ts-checker-webpack-plugin ^4.1.6 as a peer dependency and is intended for use with ts-loader's transpileOnly option. Key differentiator: allows fast incremental builds (async: true) while still showing type errors in overlay, avoiding the need to set async: false which slows down builds.