gcp-metadata dependency update & new release

[djahandarie]

Hey folks, we recently got some new logging code added to gcp-metadata in order to track down a very hard to debug issue with the metadata service on GCE returning malformed responses:

• fix: add extra logging for incorrect headers gcp-metadata#637

And it was released in googleapis/gcp-metadata#635.

Would it be possible to accelerate pulling in that new dependency version and cutting a release of this nodejs code so that we can get access to the new logs in our environment?