React Image Gallery Versions Save

• Removed unsafe lifecycles in preparation for react 17 #270
• fix startIndex not updating on change #422
• Update eslint config to extend airbnb (lots of lint errors now, lint updates coming soon...)

• react-swipeable v5 update courtesy of @hartzis 🎊 🙏 ❤️

Commit 128b552 was reverted

• Add style to package.json #394
• Add the ability to slide by hovering thumbnails #387
• fullscreen button - image doesn't fit over screen #383

Fix issue with calling window on constructor breaking SSR

• Trigger onSlide after slide transition #380
• use static event listener through lifecycle #374

• Replaced unicode underscore with regular (#337)
• fix: cancel debounce when component unmount (#328)

• Fix broken thumbnail label #295
• Allow imageSet source type #303
• RTL support #256

Fixes #288