flatpickr 1.7.3

flatpick v1.7.3

on Node.js Yarn

Changelog:

• New: self.config.onClose() that gets called on calendar close
• Migrate source, gulpfile to ES6
  • will be transpiled until widespread support
• Migrate styles from SASS to Stylus
  • also, easier theme generation
    • pull requests with new color schemes welcome