Cleans up each page after use

@@ -333,6 +333,7 @@ class PrintingPlugin extends PrintingPlatform {
         canvas.height!,
         data.toBytes(),
       );
+      page.cleanup();
     }
     t.destroy();
   }

@@ -58,6 +58,7 @@ class PdfJsDoc {
 class PdfJsPage {
   external PdfJsViewport getViewport(Settings data);
   external PdfJsRender render(Settings data);
+  external bool cleanup();
 }
 
 @anonymous