It is recommended that anytime you want to update WPGraphQL that you get familiar with what's changed in the release.
WPGraphQL publishes release notes on Github.
WPGraphQL has been following Semver practices for a few years. We will continue to follow Semver and let version numbers communicate meaning. The summary of Semver versioning is as follows:
- MAJOR version when you make incompatible API changes,
- MINOR version when you add functionality in a backwards compatible manner, and
- PATCH version when you make backwards compatible bug fixes.
You can read more about the details of Semver at semver.org.