feat: added a JSON file output upon completing the changeset

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🦋 Changeset detected

Latest commit: 4141e3cc83d577402e11e9b75e46e57f940b5fed

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ----------------- | ----- | | changesets-gitlab | Minor |

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[alshdotme]

I'd be eager to see this feature pushed over the line as I'd love to make use of this output for reporting releases via a webhook.

if there's anything I can do to help please let me know.