Core htmx API test

• swaps content properly (with oob)3ms ‣

  var output = make('<output id="output"/>')
  var oobDiv = make('<div id="oob"/>')
  htmx.swap('#output', '<div id="oob" hx-swap-oob="innerHTML">OOB Swapped!</div><div>Swapped!</div>', { swapStyle: 'innerHTML' })
  output.innerHTML.should.be.equal('<div>Swapped!</div>')
  oobDiv.innerHTML.should.be.equal('OOB Swapped!')