Add support for node v12

[mike-marcacci]

I'm sure this is already somewhere in the pipeline, but since v12 is the new LTS we're making plans to move sooner rather than later. Could we get a ballpark estimate for when v12 support might land here?

[nolanmar511]

This module depends on a native component which depends on nan.
For now, support for Node 12 is blocked by nodejs/nan#849.

[mike-marcacci]

Just to follow up, the upstream blocker is now closed, and nan is stable on v12.

[nolanmar511]

@jkwlui -- Is unit testing with Node 12 ready?

Basically, does the trampoline image "gcr.io/cloud-devrel-kokoro-resources/node:12-user" exist?

[nolanmar511]

@JustinBeckwith -- Do you know if unit testing for node 12 is ready?

[JustinBeckwith]

We just haven't got there yet. Last time I checked, we had real problems with nock, which we use heavily. We are tracking this over here:
googleapis/google-cloud-node#2923

[maxpain]

Any updates?

[nolanmar511]

pprof, which is the module @google-cloud/profiler uses to interact with V8's profilers, does have pre-built binaries available for Node 12. So, you should be able to experiment with using Node 12 and cloud-profiler-nodejs.

But, we're still blocked on unit testing for this repo by googleapis/google-cloud-node#2923.

[rokerkony]

any upgrade on this?

[nolanmar511]

We've finished adding unit testing with Node 12 for this repository.
I'm planning to release this week.

[nolanmar511]

This was fixed with v3.0.0