fixes tsoverlay checkeroption to be empty

packages/just-scripts/src/webpack/overlays/tsOverlay.ts

@@ -56,9 +56,7 @@ export const tsOverlay = (overlayOptions?: TsOverlayOptions) => {
     transpileOnly: true
   };
 
-  overlayOptions.checkerOptions = overlayOptions.loaderOptions || {
+  overlayOptions.checkerOptions = overlayOptions.checkerOptions || {};
-    transpileOnly: true
-  };
 
   return {
     resolve: {