Update cogapp to 3.4.1

mainly to support python 3.12.

tools/darwin/cog

@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import sys
 from cogapp import Cog
 

tools/darwin/cogapp/__init__.py

@@ -1,9 +1,7 @@
-""" Cog code generation tool.
+""" Cog content generation tool.
     http://nedbatchelder.com/code/cog
 
-    Copyright 2004-2012, Ned Batchelder.
+    Copyright 2004-2024, Ned Batchelder.
 """
 
-from __future__ import absolute_import
-
-from .cogapp import *
+from .cogapp import Cog, CogUsageError, main

tools/darwin/cogapp/__main__.py

@@ -1,5 +1,7 @@
 """Make Cog runnable directly from the module."""
+
 import sys
+
 from cogapp import Cog
 
 sys.exit(Cog().main(sys.argv))