Feature request: chacha-ietf-poly1305 support

[ghost]

The current implementation in https://github.com/Srar/node-tap/blob/master/src/shadowsocks/crypto/CryptoMethods/Share/AEADCryotoProcess.ts doesn't seem to support chacha-ietf-poly1305. However, the upstream in blincksocks support this method.

I would recommend adding this method, as it has better performance on mobile devices compared to other AEAD methods.