Greetings,

I recently made a lightweight Java library for working with ULIDs and optimized it for multi-threaded applications (E.g. Spring Boot applications). I would appreciate if someone can review it and check if it is properly build according to the ULID specification, and if that's the case, you can consider it as a small open-source contribution from my end.

Currently, it only capable to work with ULIDs in string format.

Here's the link to the repo:
https://github.com/marvuchko/u4j