vendor: update github.com/t3rm1n4l/go-mega and dependencies

This is to fix a crash reported in #3140

vendor/golang.org/x/crypto/ssh/handshake.go

@@ -543,7 +543,8 @@ func (t *handshakeTransport) enterKeyExchange(otherInitPacket []byte) error {
 
 	clientInit := otherInit
 	serverInit := t.sentInitMsg
-	if len(t.hostKeys) == 0 {
+	isClient := len(t.hostKeys) == 0
+	if isClient {
 		clientInit, serverInit = serverInit, clientInit
 
 		magics.clientKexInit = t.sentInitPacket
@@ -551,7 +552,7 @@ func (t *handshakeTransport) enterKeyExchange(otherInitPacket []byte) error {
 	}
 
 	var err error
-	t.algorithms, err = findAgreedAlgorithms(clientInit, serverInit)
+	t.algorithms, err = findAgreedAlgorithms(isClient, clientInit, serverInit)
 	if err != nil {
 		return err
 	}