CONTRIBUTING.txt

The project is in the public domain within the United States, and
copyright and related rights in the work worldwide are waived through
the CC0 1.0 Universal public domain dedication. See the COPYING.txt
file in this repository to view the entire CC0 dedication.

All contributions to this project will be released under the CC0
dedication. By submitting a pull request, you are agreeing to comply
with this waiver of copyright interest.