Update dependency versions

[tmatsuo]

• google/cloud: ^0.20
• google/cloud-tools: ^0.6

[bshaffer]

In general, I would prefer to have ^0.20, since the convention followed by google/cloud is to break BC on minor releases. This way, we would know for sure that all samples are on the same version. With the current syntax, one sample could be on 0.40 and another on 0.20.

Also, w/o commenting on every single one, I'd like to know why google/auth is added as a dependency.

[bshaffer]

We can remove the empty require statement here.

[bshaffer]

Remove empty require statement here!

[bshaffer]

Why are we adding the auth line? This should be left to the google/cloud library unless we are consuming the library directly (which we aren't).

[tmatsuo]

I added google/auth because I saw an error like this:

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Installation request for google/cloud ^0.20 -> satisfiable by google/cloud[v0.20.0].
    - Conclusion: remove google/auth v0.10
    - google/cloud v0.20.0 requires google/auth ^0.11 -> satisfiable by google/auth[v0.11.0, v0.11.1].
    - Can only install one of: google/auth[v0.11.0, v0.10].
    - Can only install one of: google/auth[v0.11.1, v0.10].
    - Installation request for google/auth (installed at v0.10) -> satisfiable by google/auth[v0.10].

in some sub directories, but you're right

[bshaffer]

Same here, we can leave this out.

[tmatsuo]

@bshaffer PTAL

[tmatsuo]

Finally the test passes. @bshaffer PTAL