How to copy a folder over SSH with Gulp?

I did end up finding a solution by leveraging the node scp2 library:

scpClient = require('scp2');

gulp.task('scp', [], function (cb) {
    scpClient.scp('local_folder', {
        "host": "remote_host",
        "port": "remote_port",
        "username": "username_on_remote",
        "path": "/path/on/remote",
        "agent": process.env["SSH_AUTH_SOCK"],
        "agentForward": true
    }, cb)
});