text: Title: DateTime: Support `datetime.date` as an input format with date related keywords
  Body: Currently the library only accepts `datetime.datetime`, strings (timestamps) and numbers (epoch seconds). Supporting also `datetime.date` would be trivial and it would mean users don't need to convert `datetime.date` objects they get to a supported format themselves. Based on a discussion on our Slack, `datetime.date` objects can be produced at least by FakerLibrary.