Missing dates, fine-tuning dates model.

[OleksiiYeromenko]

Hello, guys, thanks you are making a really cool tool.
I've faced with number of missing dates as wel ass false positives.
Like:

• n\nMaster Transportation Agreement, April 2020.\n\n22777 Springwoods Village - Aprill 2020 will not be recognized as next sentence starts from digits.
• record of positive Sept 1st, 2005 earnings - also not recognized if day with '-st', in your model only '-th' taken into account.
  And this is strange, as even get_raw_dates not recognize it. But if I use modified forked datefinder from your repo - it's ok: datetime.datetime(2005, 9, 1, 0, 0), 'Sept 1st, 2005'),.
• It could be 12.1987 or in 01.1988 - not recognizing date if month is in digit format.

I want to ask if there is an easy way for users to fine-tune your model?