docs(demo): add intl polyfill for safari and old it
docs(demo): add intl polyfill for safari and old it

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