[0.0.1] - Mar 16, 2020. First release. See file README.md. [0.0.2] - Mar 16, 2020. Update and clean code. [0.0.3] - Mar 23, 2020. Update code isValidShareHex. [0.0.4] - Mar 23, 2020. Update code isValidShareHex. [0.0.5] - May 24, 2020. Add feature encode/decode Base64Url. [0.1.0] - May 26, 2020. Optimal and clean code. [0.2.0] - Jul 24, 2021. Migrate to null safety.