public static BaseNCodec codec() {
        return INSTANCE;
    }
Base62 encoding which has the nice property that it does not feature any
potential word/line-breaking characters, which means encoded strings can
usually be selected in one go on web pages or in the terminal.

@see <a href="https://en.wikipedia.org/wiki/Base62">Base62 on Wiki</a>

@author vekterli
security-utils/src/main/java/com/yahoo/security/Base62.java