hx-indicator attribute

• Indicator classes are properly put on element with relative indicator7ms ‣

  this.server.respondWith('GET', '/test', 'Clicked!')
  var btn = make('<button hx-get="/test" hx-indicator="next a">Click Me!</button>')
  var a1 = make('<a id="a1"></a>')
  btn.click()
  btn.classList.contains('htmx-request').should.equal(false)
  a1.classList.contains('htmx-request').should.equal(true)
  this.server.respond()
  btn.classList.contains('htmx-request').should.equal(false)
  a1.classList.contains('htmx-request').should.equal(false)