v6.0.0-alpha.31

Bug Fixes

• Core: Fix ie11 compatibility (#10281)
• Core: Add .cjs & .mjs to interpret-files (#10288)
• Core: Fix source-map strategy for production (#10290)
• Addon-knobs: Allow text and number to take undefined values (#10101)

Maintenance

• Core: Warn about deprecated config files (#10097)
• Yarn 2: rework imports in webpack preview virtual module to fix compatibility (#10305)
• Addon-centered: Move to deprecated-addons (#10300)