v6.4.0-beta.4

Features

• Core: Support v2 compatibility mode in story index (#16226)
• Core: Support composing stories in both v6 and v7 modes (#16224)
• Web-components: Autogenerate action argTypes for event. (#16178)

Bug Fixes

• Addon-a11y: Fix type of context passed to axe.run (#16129)
• Addon-docs/Angular: Fix inline story rendering (#16149)
• Components: Fix Code component to render children as array (#15492)

Maintenance

• CLI: Remove watch mode from the build-storybook documentation (#16165)