Remove compaction on root node. Fixes #279

[davidkpiano]

This PR removes compaction on the root node, which was causing ELK to fail with self-transitions on the machine.

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Latest commit: 076a5f91960abcd8b2637f413613d29307a6d8e5

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

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| Name | Type | | -------------- | ----- | | xstate-viz-app | Patch |

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[davidkpiano]

Can u add a simple test that would just verify that the machine gets visualized correctly?

Done, please re-review

[davidkpiano]

Looks OK from mobile :) out of curiosity - what does compaction usually do? Was this misconfigured on our end or can this be classified as Elk’s bug?

It's an ELK issue, I believe. The replies here suggest that it has to do with compaction: https://github.com/kieler/elkjs/issues/98