Moved minimap rendering to offscreen canvas

src/global.d.ts

@@ -88,3 +88,14 @@ interface Blob {
   handle?: import("browser-fs-acces").FileSystemHandle;
   name?: string;
 }
+
+declare module "worker-loader!*" {
+  // You need to change `Worker`, if you specified a different value for the `workerType` option
+  class WebpackWorker extends Worker {
+    constructor();
+  }
+
+  // Uncomment this if you set the `esModule` option to `false`
+  // export = WebpackWorker;
+  export default WebpackWorker;
+}