use latest commit hash

docs/demo/demo.js

@@ -34,7 +34,7 @@ var inputDirty = true;
 var $activeOutputElem = null;
 var search = searchToObject();
 var markedVersions = {
- master: 'https://cdn.jsdelivr.net/gh/markedjs/marked@master/lib/marked.js'
+ master: 'https://cdn.jsdelivr.net/gh/markedjs/marked/lib/marked.js'
 };
 var markedVersionCache = {};
 var delayTime = 1;
@@ -116,6 +116,19 @@ function setInitialVersion() {
  $markedVerElem.appendChild(opt);
  }
  })
+ .then(function () {
+ return fetch('https://api.github.com/repos/markedjs/marked/commits')
+ .then(function (res) {
+ return res.json();
+ })
+ .then(function (json) {
+ markedVersions['master'] = 'https://cdn.jsdelivr.net/gh/markedjs/marked@' + json[0].sha + '/lib/marked.js';
+ })
+ .catch(function () {
+ // do nothing
+ // uses url without commit
+ });
+ })
  .then(function () {
  if (search.version) {
  if (!markedVersions[search.version]) {