This is a big update to ColorzCore, introducing a handful of new features, fixing a few bugs, and changes a few fundamental things (hopefully for the better).
This is a summary of the most important features and changes. Many smaller features, changes and details were omitted to make this digestible, but you can read the full list of changes in the pull-request description here: FireEmblemUniverse/ColorzCore#63.
One of the most important changes in this new version of ColorzCore is the migration from using ROM offsets to memory addresses. This is the biggest source of breaking changes, so in order to know best how to fix such issues be sure to try your best to understand this at least.