message: Make `latest-tag-button` more reliable
diff: import './latest-tag-button.css';
  import React from 'dom-chef';
  import cache from 'webext-storage-cache';
  -import select from 'select-dom';
  +import elementReady from 'element-ready';
  import * as pageDetect from 'github-url-detection';
  import {DiffIcon, TagIcon} from '@primer/octicons-react';
  @@ -96,7 +96,7 @@ async function init(): Promise<false | void> {
  </a>
  );
  - select('#branch-select-menu')!.parentElement!.after(link);
  + (await elementReady('#branch-select-menu', {waitForChildren: false}))!.parentElement!.after(link);
  if (currentBranch !== latestTag) {
  link.append(' ', <span className="css-truncate-target">{latestTag}</span>);
  }
  