v6.3.0-beta.0

Storybook 6.3 is in beta!! 🎉🎉🎉

Hundreds of improvements and fixes, including:

• Angular - Overhauled Angular support.
• Web-components - Lit2 support.
• Webpack 5 - Official support.
• Vite builder - Community support.
• Modern ESM - Modern package distribution.
• API - Keyboard shortcuts for addons.

Track the release in the Github: Storybook 6.3 Release 🛠