message: Use proper year values to parse Gregorian and week years
  Fix bug when week year was used to parse Gregorian year and the Gregorian year was used to parse week year.
diff: @@ -326,8 +326,8 @@ var parsers = {
  validate: function(_date, value, _options) {
  return value.isTwoDigitYear || value.year > 0
  },
  - set: function(date, flags, value, options) {
  - var currentYear = getUTCWeekYear(date, options)
  + set: function(date, flags, value, _options) {
  + var currentYear = date.getUTCFullYear()
  if (value.isTwoDigitYear) {
  var normalizedTwoDigitYear = normalizeTwoDigitYear(
  @@ -374,7 +374,7 @@ var parsers = {
  return value.isTwoDigitYear || value.year > 0
  },
  set: function(date, flags, value, options) {
  - var currentYear = date.getUTCFullYear()
  + var currentYear = getUTCWeekYear(date, options)
  if (value.isTwoDigitYear) {
  var normalizedTwoDigitYear = normalizeTwoDigitYear(
  