Core htmx API test

• should toggle class properly w/ selector1ms ‣

  var div = make("<div id='div1'></div>")
  div.classList.contains('foo').should.equal(false)
  htmx.toggleClass('#div1', 'foo')
  div.classList.contains('foo').should.equal(true)
  htmx.toggleClass('#div1', 'foo')
  div.classList.contains('foo').should.equal(false)