Plugins: Fix list_files with suitable required version.

Author: ikelos

volatility3/framework/plugins/mac/list_files.py

@@ -18,6 +18,8 @@
 class List_Files(plugins.PluginInterface):
     """Lists all open file descriptors for all processes."""
 
+    _required_framework_version = (1, 0, 0)
+
     @classmethod
     def get_requirements(cls):
         return [