--supress-output doesn't work on NodeJS 8.x and above

[evanp]

Tests fail for supress output if NodeJS is 8.x or above. Seems to be a difference in the way the console is initialized; it grabs the process.stdout before we can replace it with a dummy.

This keeps tests for v0.8.x from working for later versions.

[JerrySievert]

perhaps grab console._stdout?

[evanp]

It might also be possible to overwrite console