fix(event): Fix firing of GRAPH_LAYOUT_END_EVENT

[jeff-phillips-18]

What

Closes #79

Description

Update layouts to fire the GRAPH_LAYOUT_END_EVENT only after the layout is complete

Type of change

• [x] Bugfix

[github-actions[bot]]

:tada: This PR is included in version 5.0.0-prerelease.4 :tada:

The release is available on:

• GitHub release
• npm package (@prerelease dist-tag)

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