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:
You can read more about the details of Semver at semver.org.