Core htmx API test

• swap outerHTML works when parent is removed7ms ‣

  this.server.respondWith('GET', '/test', 'delete')
  var parent = make('<div><div id="d1" hx-swap="outerHTML" hx-get="/test">click me</div></div>')
  var div = htmx.find(parent, '#d1')
  div.click()
  div.remove()
  parent.remove()
  this.server.respond()
  parent.children.length.should.equal(0)