Core htmx Shadow DOM Tests

• properly handles hx-select for basic situation9ms ‣

  var i = 1
  this.server.respondWith('GET', '/test', "<div id='d1'>foo</div><div id='d2'>bar</div>")
  var div = make('<div hx-get="/test" hx-select="#d1"></div>')
  div.click()
  this.server.respond()
  div.innerHTML.should.equal('<div id="d1">foo</div>')