message: Support 0 width, height, and padding.
  Fixes
diff: @@ -324,13 +324,13 @@ async function _embed(
  }
  if (opts) {
  - if (opts.width) {
  + if (opts.width != null) {
  view.width(opts.width);
  }
  - if (opts.height) {
  + if (opts.height != null) {
  view.height(opts.height);
  }
  - if (opts.padding) {
  + if (opts.padding != null) {
  view.padding(opts.padding);
  }
  }
  