Core htmx API test

• should toggle class properly0ms ‣

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