Fix issues from recent merges

Author: Tranquility2

core/testcontainers/core/config.py

@@ -4,7 +4,7 @@
 from os import environ
 from os.path import exists
 from pathlib import Path
-from typing import Optional, Union
+from typing import Optional, Union, cast
 
 import docker
 
@@ -21,7 +21,7 @@ def use_mapped_port(self) -> bool:
 
         This is true for everything but bridge mode.
         """
-        if self == self.bridge_ip:
+        if cast(str, self) == self.bridge_ip:
             return False
         return True
 
@@ -63,7 +63,7 @@ def get_user_overwritten_connection_mode() -> Optional[ConnectionMode]:
     """
     Return the user overwritten connection mode.
     """
-    connection_mode: str | None = environ.get("TESTCONTAINERS_CONNECTION_MODE")
+    connection_mode: Union[str, None] = environ.get("TESTCONTAINERS_CONNECTION_MODE")
     if connection_mode:
         try:
             return ConnectionMode(connection_mode)

core/testcontainers/core/docker_client.py

@@ -222,7 +222,7 @@ def get_connection_mode(self) -> ConnectionMode:
         # default for DinD
         return ConnectionMode.gateway_ip
 
-    def host(self) -> Optional[str]:
+    def host(self) -> str:
         """
         Get the hostname or ip address of the docker host.
         """