v5.1.0-alpha.15

Features

• Addon-a11y: Highlight a11y violations on component (#6218)
• HTML: Allow forced renders in @storybook/html (#6190)

Bug Fixes

• Core: Enforces corejs v2 for babel (#6267)
• Knobs: Rename ALL panel to Other for ungrouped knobs (#6232)
• UI: zoom iframe content instead zoom iframe wrapper (#6126)
• Addon-actions: safe render for cyclic obj (#6240)

Maintenance

• Addon-knobs: adds an example of a boolean knob (#6242)

Dependency Upgrades

• Bump simplebar-react from 0.1.4 to 0.1.5 (#6226)
• FIX storybook having a incompatible version of webpack with vue-cli (#6259)