csrf_enabled 被 deprecated 了，应该怎么改啊？！

[coolair]

https://github.com/lepture/flask-wtf/pull/271

现在一直报警告：
FlaskWTFDeprecationWarning: "csrf_enabled" is deprecated and will be removed in 1.0. Set "meta.csrf" instead.

我代码里有这么一段在 MyForm 的 class 里：
def __init__(self, csrf_enabled=False, *args, **kwargs):
....super(MyForm, self).__init__(csrf_enabled=csrf_enabled, *args, **kwargs)