Open GitHub issue description links in a new tab when rendering on app.zenhub.com

user.js

var mutationObserver = new MutationObserver(function(mutations) {
  mutations.forEach(function(mutation) {
  	Array.prototype.forEach.call(document.querySelectorAll('.zhc-markdown a'), function(el, i) {
      el.setAttribute('target', '_blank')
  	})
  })
})

mutationObserver.observe(document.documentElement, {
  childList: true,
  subtree: true
})