v3.0.0

Changed

• Swapped SCSS from flex-grid.scss with _index.scss to match the rest of Fylgja's components
• Renamed $breakpoints to $flex-grid-breakpoints
• breakpoints handled now by @fylgja/mq,
  but still changeable trough the $flex-grid-breakpoints
• breakpoints changed values;
  • xs (0) is now xxs
  • For the rest of the see breakpoints, see the @fylgja/mq docs
• Upgrade SCSS syntax to newer syntax, requires Dart Sass 1.33.0 or higher.

v2.1.1...v3.0.0