Binary package “golang-github-protonmail-go-crypto-dev” in ubuntu lunar

Go supplementary cryptography libraries

 This module is backwards compatible with x/crypto/openpgp, so you
 can simply replace all imports of golang.org/x/crypto/openpgp with
 github.com/ProtonMail/go-crypto/openpgp.
 .
 A partial list of changes is here:
 https://github.com/ProtonMail/go-crypto/issues/21#issuecomment-492792917.