* Added an API for notifying the Runtime when an XBlock's ``save()`` method is called.
* Added a mechanism for Runtime subclasses to more easily add extra CSS classes to the ``<div>`` that wraps rendered XBlocks
1.2.3
------------------
Allow Mixologist class to consume both class objects and string paths to classes as a part of initialization.
1.2.1
------------------
Suppress a spurious warning when using lazily-translated text as the default value of a String field.
1.2.0
-----------------------
* Add capability for XBlockAsides to apply only to XBlocks that match certain conditions
1.0 - Python 3 --------------
* Introduce Python 3 compatibility to the xblock code base. This does not enable Python 2 codebases (like edx-platform) to load xblocks written in Python 3, but it lays the groundwork for future migrations.
0.12.0
------------------ * dropped python 3.8 support * transitioned from deprecated pkg_resources lib to importlib.resources