• Improve module loading logic (thanks to @tunnckoCore).
• Improve minification of numeric values, with better support for rem,
  trailing zeroes and slash/comma separated values
  (thanks to @TrySound & @tunnckoCore).
• Fixed an issue where -webkit-tap-highlight-color values were being
  incorrectly transformed to transparent. This is not supported in Safari.
• Added support for viewport units (thanks to @TrySound).
• Add MIT license file.