Support Svelte 4

[Lechros]

PeerDependency should be updated.
https://svelte.dev/docs/v4-migration-guide

[ WARN]  Issues with peer dependencies found
.
└─┬ svelte-local-storage-store 0.4.0
  └── ✕ unmet peer svelte@^3.48.0: found 4.2.0

[github-actions]

🎉 This issue has been resolved in version 0.6.1 🎉

The release is available on:

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

Your semantic-release bot 📦🚀