fix: Animation running on initial render leads to jarring UX

[b-zurg]

Especially as certain size calculations can only happen after the component has mounted, the animation of collapsing a pane, or setting a proportional size is really annoying.

The animation should only happen based on user actions after the first render has happened.

[github-actions]

🎉 This issue has been resolved in version 1.3.3 🎉

The release is available on:

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

Your semantic-release bot 📦🚀