Use the unified composite type package from ai3/go-common

Avoid implementing our own version of asp/userenckey/u2f serialization
and deserialization.
4 jobs for master in 5 minutes and 39 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build Pkgsrc
passed #6971
build_pkgsrc:stretch

00:00:20

 
  Build Pkg
passed #6972
amd64
build_pkg:stretch:amd64

00:01:37

passed #6973
arm64
build_pkg:stretch:arm64

00:04:34

 
  Upload Pkg
passed #6974
upload_pkg

00:00:42