add facade in readme
add facade in readme

i was looking at the documentation and noticed you dont mention the Laravel Facade capabilities, which made me go back at old code to find that it was possible (as i recalled).

anyway, if for some reason this is a bad idea let me know!
andhikamaheva/date,jenssegers/date,jenssegers/laravel-date,mikkpokk/date,kadirarlii/date