message: Specify return type for drawable promise
diff: @@ -25,7 +25,7 @@ export async function getDrawable(url: string): Promise<CanvasImageSource> {
  const blob = await response.blob();
  return await createImageBitmap(blob);
  } else {
  - return new Promise((resolve, reject) => {
  + return new Promise<HTMLImageElement>((resolve, reject) => {
  const img = document.createElement("img");
  img.crossOrigin = "anonymous";
  img.onload = function() {
  