v6.4.0-rc.4

Bug Fixes

• Core: Fix process.env stringification (#16725)
• Core: Fix build-storybook sort bug in v6-mode (#16724)
• Addon-docs/Angular: fix extractEnumValues undefined error (#16524)

Maintenance

• Angular: update addon interactions example (#16698)

Dependency Upgrades

• Upgrade from node-sass to sass in examples/angular-cli (#16663)