Core htmx API test

• ajax api can pass parameters7ms ‣

  this.server.respondWith('POST', '/test', function(xhr) {
    var params = getParameters(xhr)
    params.i1.should.equal('test')
    xhr.respond(200, {}, 'Clicked!')
  })
  var div = make("<div id='d1'></div>")
  htmx.ajax('POST', '/test', { target: '#d1', values: { i1: 'test' } })
  this.server.respond()
  div.innerHTML.should.equal('Clicked!')