Check on matching on Cyrillic (Русский) strings

[whatSocks]

see discussion here: https://github.com/neo4j-contrib/neomodel/pull/364

perhaps match(some_property='bar').all_relationships() doesn't work with Cyrillic strings.

check on proposed solution:

https://docs.python.org/2/library/re.html#re.UNICODE we just need to set this flag where the regex is being used. Can you do that and put it in a separate MR from this one please. Thanks!