chore: adhere to ruff's UP

basically use `list` and `type` instead of `List` and `Type`

this is save to use for python3.9 and has been deprecated. also has some
performance drawbacks.
read more here: https://docs.astral.sh/ruff/rules/non-pep585-annotation/

lnbits/wallets/base.py

@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from abc import ABC, abstractmethod
-from typing import TYPE_CHECKING, AsyncGenerator, Coroutine, NamedTuple, Optional, Type
+from typing import TYPE_CHECKING, AsyncGenerator, Coroutine, NamedTuple, Optional
 
 if TYPE_CHECKING:
     from lnbits.nodes.base import Node
@@ -96,7 +96,7 @@ class Wallet(ABC):
     async def cleanup(self):
         pass
 
-    __node_cls__: Optional[Type[Node]] = None
+    __node_cls__: Optional[type[Node]] = None
 
     @abstractmethod
     def status(self) -> Coroutine[None, None, StatusResponse]:

lnbits/wallets/fake.py

@@ -37,7 +37,7 @@ class FakeWallet(Wallet):
     privkey: str = hashlib.pbkdf2_hmac(
         "sha256",
         secret.encode(),
-        ("FakeWallet").encode(),
+        b"FakeWallet",
         2048,
         32,
     ).hex()