yatszhash

I met same problems too under proxy on windows. On windows, I got ''' ERROR: Error: getaddrinfo EAI_AGAIN cloudfunctions.googleapis.com:443 at new RequestError (C:\Users\USER_NAME\AppData\Roaming\npm\node_modules\@google-cloud\functions-emulator\node_modules\googleapis\node_modules\google-auth-lib rary\lib\transporters.js:34:42) at Request._callback (C:\Users\USER_NAME\AppData\Roaming\npm\node_modules\@google-cloud\functions-emulator\node_modules\googleapis\node_modules\google-auth-li brary\lib\transporters.js:108:23) '''

I implemented nifriedly's idea on [my branch](https://github.com/yatszhash/solr-node-client/tree/support_proxy). It works via proxy. If there isn't any reason to use http or https module instead of request module, I want to send...