message: fix(@vant/markdown-loader): improve highlight API
diff: @@ -2,7 +2,8 @@ const hljs = require('highlight.js');
  module.exports = function highlight(str, lang) {
  if (lang && hljs.getLanguage(lang)) {
  - return hljs.highlight(lang, str, true).value;
  + // https://github.com/highlightjs/highlight.js/issues/2277
  + return hljs.highlight(str, { language: lang, ignoreIllegals: true }).value;
  }
  return '';
  