fix(calendar): make tslint pass #6375

Author: hanastasov

projects/igniteui-angular/src/lib/calendar/calendar-helper-utils.ts

@@ -159,4 +159,4 @@ export class HelperTestFunctions {
             )
         ).toBe(false);
     }
-}
+}

projects/igniteui-angular/src/lib/calendar/months-view.pipe.ts

@@ -22,4 +22,4 @@ export class IgxGetViewDateCalendar implements PipeTransform {
         const date = this.calendar.timedelta(viewDate, 'month', index);
         return wholeDate ? date : date.getMonth();
     }
-}
+}