Be py3 compatible, thanks to byronrthomas.
What's Changed
* Make compatible with python3 by byronrthomas in https://github.com/alexmgr/tinyec/pull/3
New Contributors
* byronrthomas made their first contribution in https://github.com/alexmgr/tinyec/pull/3
**Full Changelog**: https://github.com/alexmgr/tinyec/compare/v0.3.1...v0.4.0