Update policy This build is a development build. That means that it is not only not as stable as release builds but also that its features are always subject to change. Features in development builds might be removed or changed without automatical data converters in a following build. The builds posted here are only builds from the master branch.
The reason why the old branch (0.17) wasn't updated is that the changes made to the project setup in order to support Minecraft 1.14 are rather far reaching, and they coincidenced with the API updates for 0.18. 0.18 is supposed to become a major feature update once it's ready that was and is developed independently of Minecraft updates - that means even if there is this early dev build, it will still take a while until it is finished.
Support for Minecraft 1.14 / 1.15 The current development builds come with technical support for Minecraft 1.14.x-1.15.x. This means technical inclusion and consideration of 1.14.x-1.15.x features are present.
The the item library Caliburn hasn't been updated yet. This is intentional.