v0.21.0

What's Changed

• Adding support for comp-styles and comp-overrides by @JayaKrishnaNamburu in #672

• Changing react to export css by default
• All flavours change the comp-scoped styles to dashCase(CSS, CSS-Modules, StyledJSX) and cameCase(StyledJSX, StyledComponents).
• Global style sheets of Plain CSS and StyledJSX don't change names, just simply appends whatever coming from UIDL (studio).
• Adding support for component-variants we have component-overrides before. This adds another feature
• Next with CSSModules fix for project template
• Lots of refactoring and fixes along the way

Full Changelog: v0.20.7...v0.21.0