Use the OpenTok SDK for ping.

Yeah, it looks like there have only been [7 commits](https://github.com/CrowdProcess/superagent-hawk/compare/eb061e8...master) in master since superagent-hawk@0.0.3 was tagged in package.json.
And it has been almost a  year since [CrowdProcess/superagent-hawk](https://github.com/CrowdProcess/superagent-hawk/) has seen a commit. Not sure if it is an active project anymore, but at the very least we can probably just pin it to the latest commit in master (69ee9c, which is what you currently have) until they add a label/tag and push a new version to npm.