words_matching method

[alxwrd]

There is a long_word_count already defined, so it might be best just to stick with what this is already doing.

Originally posted by @alxwrd in #174 (comment)

Just a thought currently, not fleshed out. It might be nice to have a words_matching() method, that takes a query like in sqlalchemy.

select(user_table).where(user_table.c.name == 'spongebob')

I have no idea how the where method is implemented in sqlalchemy.

Useage would be something like:

textstat.words_matching(word > 6)