ciborium: Migrate to supported Go version (upstream)
The current code base needs to be ported to Go modules in order to work with the Go version in Debian unstable, see https://gitlab.com/ubports/development/core/ciborium/-/issues/7.
The current code base needs to be ported to Go modules in order to work with the Go version in Debian unstable, see https://gitlab.com/ubports/development/core/ciborium/-/issues/7.