Optimised innerHTML
This release is very minor in scope, but has knock-on effects to DomTemplate, specifically phpgt/DomTemplate#124
The changes in this release mean that setting an innerHTML of an empty string is much more efficient, and this can now be done on DocumentFragments too. Before, this would cause an exception, due to there not being a parent element.
Changes in DomTemplate are incoming so that binding an empty dataset to an list element will set the innerHTML to an empty string, which means that the :empty CSS selector will now be valid for empty lists.