Extend Absatz regex part

[S1SYPHOS]

Hello,
thinking about it, I guess you could add support for detecting Absatz when written as capital roman letters, like in § 433 II BGB by changing the corresponding group with (?:(?:Abs\.\s*)?(?<absatz>\d+|[XIV]+(?:\w\b)))?, what do you think?

From README.md:

Auch sind keine römischen Absatznummerierungen vorgesehen.

Don't know if that means you won't support or just not right now at least .. let me know!

Cheers!