message: Replace instanceof Date with safer alternative in toDate
diff: @@ -99,7 +99,9 @@ export default function toDate (argument, dirtyOptions) {
  }
  // Clone the date
  - if (argument instanceof Date) {
  + if (argument instanceof Date ||
  + (typeof argument === 'object' && Object.prototype.toString.call(argument) === '[object Date]')
  + ) {
  // Prevent the date to lose the milliseconds when passed to new Date() in IE10
  return new Date(argument.getTime())
  } else if (typeof argument === 'number' || Object.prototype.toString.call(argument) === '[object Number]') {
  