hx-disabled-elt attribute

• single element can be disabled w/ hx-disabled elts6ms ‣

  this.server.respondWith('GET', '/test', 'Clicked!')
  var btn = make('<button hx-get="/test" hx-disabled-elt="this">Click Me!</button>')
  btn.hasAttribute('disabled').should.equal(false)
  btn.click()
  btn.hasAttribute('disabled').should.equal(true)
  this.server.respond()
  btn.hasAttribute('disabled').should.equal(false)