This project has a CC-BY-SA-3.0 license from the method levenshtein. This would probably turn the entire project into a CC-BY-SA-3.0 license.

https://creativecommons.org/licenses/by-sa/3.0/deed.en

If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.

And, CC-BY-SA-3.0 license prevents the use in non-open-source projects. Please consider replacing the implementation of levenshtein to remove this license.