Don't dispatch REJECT action to resolver when loadingTask was destroyed

loadingTask.promise throws after loadingTask.destroy() is called, and we call loadingTask.destroy() to destroy worker once it loaded the PDF. If we destroy it before loadingTask.promise resolves, this produces an error that should not be treated as one.

src/Document.tsx

@@ -376,6 +376,10 @@ const Document = forwardRef(function Document(
         pdfDispatch({ type: 'RESOLVE', value: nextPdf });
       })
       .catch((error) => {
+        if (loadingTask.destroyed) {
+          return;
+        }
+
         pdfDispatch({ type: 'REJECT', error });
       });