message: fix(common): export the IMAGE_CONFIG token
  The token introduced in was not exported publicly.
  PR Close
diff: @@ -12,5 +12,5 @@ export {provideCloudinaryLoader} from './image_loaders/cloudinary_loader';
  export {IMAGE_LOADER, ImageLoader, ImageLoaderConfig} from './image_loaders/image_loader';
  export {provideImageKitLoader} from './image_loaders/imagekit_loader';
  export {provideImgixLoader} from './image_loaders/imgix_loader';
  -export {NgOptimizedImage} from './ng_optimized_image';
  +export {IMAGE_CONFIG, ImageConfig, NgOptimizedImage} from './ng_optimized_image';
  export {PRECONNECT_CHECK_BLOCKLIST} from './preconnect_link_checker';
  