We should run `cargo publish --dry-run` in the CI builds

[coryan]

We need to verify the packages can be created and pass the necessary tests.

[codyoss]

I think the extra building we do in CI should now catch what this would. Do we think this is still needed?

[coryan]

I think it is needed. When we change gcp-sdk-gax (or any library that another library depends on) we need to make sure the version numbers in the Cargo.toml files are good. Today we cannot verify that until the lower-level crate is published, which is sad.

In other words, none of the existing CI builds verify the version numbers in Cargo.toml files until it is too late.

Though maybe I am missing something.