- Migrate to null-safety.
- Fixed some hints.
- Updated description.
- Added example.
- Added CHANGELOG.md.
- Updated description.
- Formatted lib/xxtea.dart.
- Changed the static XXTEA class to a normal class.
- Added const xxtea.
- Added xxteaEncrypt, xxteaDecrypt, xxteaEncryptToString, xxteaDecryptToString.
- Fixed compatibility with Dart 2.
- Initial Open Source release.