MRZ Checker: Disable Checks For Some Fields

[Arg0s1080]

Comes from #3

I think it would be a good idea to add the possibility of disabling checks for certain fields in future mrz.checker versions.

[xxxpsyduck]

Is this function available in the code now?

[Arg0s1080]

I'm sorry, but not yet. That feature is only available in Generator (for country, nationality and document_type codes)

Out of curiosity, what do you need?

[xxxpsyduck]

@Arg0s1080 I just want the ability to disable optional data check in pip package. Btw I switched to the source code in your repo and modified it. Everything is ok now.