[v5] Final .data to .output

[davidkpiano]

This PR renames .data to .output on final states:

const machine = createMachine({
  // ...
  states: {
    // ...
    success: {
-     data: { message: 'Success!' }
+     output: { message: 'Success!' }
    }
  }
})

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🦋 Changeset detected

Latest commit: 95d36cc

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

This PR includes changesets to release 1 package

Name	Type
xstate	Major

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[Andarist]

this later becomes part of the done.state.* and done.invoe.* events, should we rename the properties in those events as well?

[davidkpiano]

I'm not sure. I think there should be a difference between "this is the output of this machine" and "this is the data in this event". Not sure yet.