Core htmx AJAX Tests

• sets the content type of the request properly7ms ‣

  this.server.respondWith('GET', '/test', function(xhr) {
    xhr.respond(200, {}, 'done')
    xhr.overriddenMimeType.should.equal('text/html')
    done()
  })
  var div = make('<div hx-get="/test">Click Me!</div>')
  div.click()
  this.server.respond()