[Feature Request]Whether to support "curves": "secp521r1",？

[AbianTang]

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[ArcCal]

这个项目都停更好久了，开发者都放弃了，没人维护了，怎么还在提这些

[AbianTang]

这个项目都停更好久了，开发者都放弃了，没人维护了，怎么还在提这些

但还是很好用呀