[Plugins/Command] Awful hack to allow setting type of args

Oh boy, here I go evaling user-defined strings again

plugins/Command.py

@@ -114,6 +114,8 @@ class CommandPlugin(PluginBase):
         cmd = Command(name, help, aliases=aliases)
 
         for argnode in [node for node in _children if node.name == 'arg']:
+            if argnode.props.get('type'):
+                argnode.props['type'] = eval(argnode.props['type'])
             cmd.add_arg(*argnode.args, **argnode.props)
 
         self.commands[name] = (cmd, actionnode, display)