Core htmx internals Tests

• internalAPI settleImmediately completes settle tasks2ms ‣

  // settleImmediately is no longer used internally and may no longer be needed at all
  // as swapping without settleing does not seem via internalAPI
  const fragment = htmx._('makeFragment')('<div>Content</div>')
  const historyElement = htmx._('getHistoryElement')()
  const settleInfo = htmx._('makeSettleInfo')(historyElement)
  htmx._('swapInnerHTML')(historyElement, fragment, settleInfo)
  historyElement.firstChild.className.should.equal('htmx-added')
  htmx._('settleImmediately')(settleInfo.tasks)
  historyElement.firstChild.className.should.equal('')