Add support for the crypto refresh in v2 (#265)

This commit adds support for the OpenPGP crypto-refresh.
- Updates go-crypto dependency to v1.1.0-alpha.1
- Adapts the session key logic to handle PKESK/SKESK v6 packets without an algorithm attached
- Updates the min go version to 1.17 as requires by  go-crypto v1.1.0-alpha.1
- Update the cricl dependency to 1.3.7 matching go-crypto
Not supported:
- crypto-refresh intended recipients
- v6 key generation

crypto/password.go

@@ -57,6 +57,7 @@ func DecryptSessionKeyWithPassword(keyPacket, password []byte) (*SessionKey, err
 			key, cipherFunc, err := s.Decrypt(password)
 			if err == nil {
 				sk := &SessionKey{
+					V6:   s.Version == 6,
 					Key:  key,
 					Algo: getAlgo(cipherFunc),
 				}