修改自Joachim Henke的php代码,查看 https://base91.sourceforge.net/
Modified from Joachim Henke's php code, see at https://base91.sourceforge.net/
base91Encode("abcdefgHIJKLMN0123456789!@$%^&*()-=<>?:{}");
// return "#G(Ic,5p(5qOdwQb?texAkZdx2G?*NyWqOa16dvz{0&_t[rU`]D"
base91Decode("#G(Ic,5p(5qOdwQb?texAkZdx2G?*NyWqOa16dvz{0&_t[rU`]D")
// return "abcdefgHIJKLMN0123456789!@$%^&*()-=<>?:{}"