Our versioning scheme means you can quickly identify which versions are backwards compatible.
In major releases we break backwards compatability. This gives us the chance to change our API and remove unused methods to help keep file sizes down.
In minor releases we add new features and make backwards compatible changes. You can update to a new minor release without changing any of your code.
In point releases we only fix bugs. The interface remains unchanged. Because of this, we don't release a new set of documentation for point releases.