Update SPGL for Python 3.x

Author: JohnnyPhil22

Missile Command/__pycache__/spgl.cpython-311.pyc

@@ -3,15 +3,15 @@
 # Import message box
 # This code is necessary for Python 2.x and 3.x compatibility
 try:
-    import tkMessageBox as messagebox
+    import tkinter.messagebox as messagebox
 except:
     from tkinter import messagebox
 
 # Import filedialog
 try:
 	from tkinter import filedialog
 except:
-	import tkFileDialog as filedialog
+	import tkinter.filedialog as filedialog
 
 
 # If on Windows, import winsound or, better yet, switch to Linux!