Fix: Solve mypy issues

src/aleph_vrf/coordinator/executor_selection.py

@@ -2,7 +2,7 @@
 import json
 import random
 from pathlib import Path
-from typing import Any, AsyncIterator, Dict, List
+from typing import Any, AsyncIterator, Dict, List, Union
 
 import aiohttp
 from aleph_message.models import ItemHash
@@ -133,10 +133,12 @@ class UsePredeterminedExecutors(ExecutorSelectionPolicy):
     Use a hardcoded list of executors.
     """
 
-    def __init__(self, executors: List[VRFExecutor]):
+    def __init__(self, executors: List[Union[Executor, AlephExecutor]]):
         self.executors = executors
 
-    async def select_executors(self, nb_executors: int) -> List[VRFExecutor]:
+    async def select_executors(
+        self, nb_executors: int
+    ) -> List[Union[Executor, AlephExecutor]]:
         """
         Returns nb_executors from the hardcoded list of executors.
         If nb_executors is lower than the total number of executors, this method