replace electrum/ecc with electrum_ecc package

electrum/lntransport.py

@@ -11,10 +11,11 @@ from asyncio import StreamReader, StreamWriter
 from typing import Optional
 from functools import cached_property
 
+import electrum_ecc as ecc
+
 from .crypto import sha256, hmac_oneshot, chacha20_poly1305_encrypt, chacha20_poly1305_decrypt
 from .lnutil import (get_ecdh, privkey_to_pubkey, LightningPeerConnectionClosed,
                      HandshakeFailed, LNPeerAddr)
-from . import ecc
 from .util import MySocksProxy