Imports of package ed448

PathSynopsis
crypto/subtlePackage subtle implements functions that are often useful in cryptographic code but require careful thought to use correctly.
github.com/ProtonMail/go-crypto/openpgp/errorsPackage errors contains common error types for the OpenPGP packages.
github.com/cloudflare/circl/sign/ed448Package ed448 implements Ed448 signature scheme as described in RFC-8032.
ioPackage io provides basic interfaces to I/O primitives.