chore: update python packages + formatting + cleanup (#3221)

tests/wallets/test_nwc_wallets.py

@@ -2,14 +2,14 @@ import base64
 import hashlib
 import json
 import time
-from typing import Dict, cast
+from typing import cast
 
 import pytest
 import secp256k1
 from Cryptodome import Random
 from Cryptodome.Cipher import AES
 from Cryptodome.Util.Padding import pad, unpad
-from websockets.server import serve as ws_serve
+from websockets.legacy.server import serve as ws_serve
 
 from lnbits.wallets.nwc import NWCWallet
 from tests.wallets.helpers import (
@@ -49,7 +49,7 @@ def decrypt_content(priv_key, source_pub_key, content):
 
 
 def json_dumps(data):
-    if isinstance(data, Dict):
+    if isinstance(data, dict):
         data = {k: v for k, v in data.items() if v is not None}
     return json.dumps(data, separators=(",", ":"), ensure_ascii=False)