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MAJOR version changes are made when significant new features are introduced. Usually, these new features are visible to the user, but occasionally they may just be significant improvements under the hood. Changes may include breaking changes, but if so, this will be clearly stated in the release notes.
MINOR version changes are made when new features or improvements (or both) are introduced, which should be fully backward-compatible.
PATCH versions do not include any new features or improvements, but only fixes we of what we have considered unintended behavior (commonly referred to as bugs).
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