Rename FastMCP to MCPServer (#1951)

tests/client/test_logging_callback.py

@@ -4,7 +4,7 @@ import pytest
 
 import mcp.types as types
 from mcp import Client
-from mcp.server.fastmcp import FastMCP
+from mcp.server.mcpserver import MCPServer
 from mcp.shared.session import RequestResponder
 from mcp.types import (
     LoggingMessageNotificationParams,
@@ -22,7 +22,7 @@ class LoggingCollector:
 
 @pytest.mark.anyio
 async def test_logging_callback():
-    server = FastMCP("test")
+    server = MCPServer("test")
     logging_collector = LoggingCollector()
 
     # Create a simple test tool