fix: allow any 1.x version of date-fns to be installed
fix: allow any 1.x version of date-fns to be installed

mattlewis92/angular-calendar,mattlewis92/angular-calendar,juanfc/angular-calendar,juanfc/angular-calendar,juanfc/angular-calendar,SamindaK/angular-calendar,mattlewis92/angular2-calendar,SamindaK/angular-calendar,mattlewis92/angular2-calendar,SamindaK/angular-calendar,mattlewis92/angular-calendar,mattlewis92/angular-calendar,mattlewis92/angular2-calendar,juanfc/angular-calendar