v0.2.0

New features

• Add icon button variant (.btn--icon).

Improvements

• Add $btn-font-family to control the button's font family.
• Add $heading-font-weight to control the heading's font-weight.
• Rename some keys in the $colors map (mark-color : mark-foreground, code-color : code-foreground).
• Reorganize the recurrent colors into variables.
• Modify btn-variant() mixin: add hover foreground color.
• Global switch to color() function's fallback value under the $settings map.
• Modify the scrollbar() mixin to accept hover thumb background-color value.
• Make $breakpoints overwriteable by key.
• Modify font-size() and responsive-font-size() function to accept optimal size value. The optimal value will fallback to a global settnigs under the $settings map.

Bugfix

• Fix some missing !default at variable declaration.