Core htmx API test

• should find properly1ms ‣

  var div = make("<div id='d1' class='c1 c2'>")
  div.should.equal(htmx.find('#d1'))
  div.should.equal(htmx.find('.c1'))
  div.should.equal(htmx.find('.c2'))
  div.should.equal(htmx.find('.c1.c2'))

• should find properly from elt0ms ‣

  var div = make("<div><a id='a1'></a><a id='a2'></a></div>")
  htmx.find(div, 'a').id.should.equal('a1')