Controlled and stateful variants

• Merge branch 'master' of github.com:lkostrowski/mui-lightbox 7ca1670
• feat: 🎸 Add stateful and controlled versions 67a467a
• docs: ✏️ Add examples for backdrop variants 00643b9
• Update README.md 3c46340
• Update README.md 8341de2
• Update README.md d922af7
• Update README.md 2a9b4ea

v0.1.2...v0.2.0

Deps, docs

v0.1.2

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