[api] emit a headers event before we proxy the request with the requests headers
[api] emit a headers event before we proxy the request with the requests headers

nodejitsu/smart-private-npm,cube-io/smart-private-npm,nodejitsu/smart-private-npm,warehouseai/smart-private-npm,terinjokes/smart-private-npm,terinjokes/smart-private-npm,doublerebel/smart-private-npm,warehouseai/smart-private-npm,doublerebel/smart-private-npm,cube-io/smart-private-npm