Old version of cppcodec

[panicgh]

nitrokey-app uses a very old version of cppcodec (unreleased/-tagged, a commit from 2016) via a git submodule.

It may be worthwhile to update the git submodule to a later version. For example, I tried the latest tagged version v0.2 (2018) and so far it seems to work just fine. The latest commits are from 2022.

[szszszsz]

Hi!
Thank you for checking that out. For our very small use case it was good enough at the time (hex-base32 conversion). Perhaps worth updating in case there were any security updates, otherwise let's use what is proved to be working stably.
Leaving open in case there would be another release.