v6.0.0-alpha.5

Features

• Core: Add Yarn 2 compatibility (#9667)
• Addon-a11y: Add preset (#9697)
• Server: Initial support for @storybook/server (#9722)

Bug Fixes

• Svelte: Fix Svelte 3 slots for decorators (#9724)

Maintenance

• Cra-ts-kitchen-sink: Fix stories glob pattern (#9706)