license: remove previous copyright attributed to Miao Jiang [skip ci]
license: remove previous copyright attributed to Miao Jiang [skip ci]

There are no more code similarities between this project and
 https://github.com/jiangmiao/node-curl.

All previous code was rewritten/removed.

JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl