fixed + completed type hints

config.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import json
 import re
 
@@ -29,8 +31,9 @@ class Config:
     
     def __init__(self, path: str = "config.json") -> None:
         self.load(path)
-    
-    def load(self, path: str) -> None:
+
+    @staticmethod
+    def load(path: str) -> None:
         with open(path, "r") as f:
             config = json.load(f)
             
@@ -39,5 +42,6 @@ class Config:
                 if hasattr(Config, k):
                     setattr(Config, k, v)
 
+    @staticmethod
     def formatKey(key: str) -> str:
-        return re.sub(r"([a-z])([A-Z])", r"\1_\2", key).upper()
+        return re.sub(r"([a-z])([A-Z])", r"\1_\2", key).upper()