react-big-calendar: add missing views: 'Views.day', 'Views.agenda', rename 'Views.myweek->work_week'
react-big-calendar: add missing views: 'Views.day', 'Views.agenda', rename 'Views.myweek->work_week'

mcliment/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,georgemarshall/DefinitelyTyped,dsebastien/DefinitelyTyped,georgemarshall/DefinitelyTyped,markogresak/DefinitelyTyped,borisyankov/DefinitelyTyped,borisyankov/DefinitelyTyped,georgemarshall/DefinitelyTyped