Content (inner text) should be placed in the correct order

[DavidVujic]

Describe the bug
Content is placed after any child elements of a html element. It should be able to use the position in the hiccup sequence.

To Reproduce
This test will fail:

def test_order_of_items() -> None:
    """Assert that items of different types are ordered as expected."""
    data = ["h1", "some", ["span.pys", "<py>"], "jokes"]

    assert render(data) == '<h1>some<span class="pys">&lt;py&gt;</span>jokes</h1>'

The rendered output is

<h1><span class="pys">&lt;py&gt;</span>somejokes</h1>

Expected behavior
It should be possible to specify the content to be before any child elements.