This version is a pure refactoring release, and does not contain new features or bug fixes. It strives to improve the compatibility of our templates with alternative Jinja-like template engines that we're currently exploring, including minijinja.
Additionally, it replaces several instances of Python function invocations with idiomatic use of template filters. All instances where variables have been mutated inside templates have been replaced. Most changes have been made in partials, and only a few in blocks, and all of them are fully backward compatible, so no changes to overrides are necessary.
Note that this release does not replace the Jinja template engine with minijinja. However, our templates are now 99% compatible with minijinja, which means we can explore alternative Jinja-compatible implementations. Additionally, immutability and removal of almost all Python function invocations means much more idiomatic templating.