Transport member of ServiceClientOptions should be optional

[virtuald]

What the title says. Should be good, given that clients are initialized with...

function BookServiceClient(serviceHost, options) {
  this.serviceHost = serviceHost;
  this.options = options || {};
}

[jonnyreeves]

Thanks for contributing @virtuald! I'm happy to approve this change, but you also need to re-generate the example code. You can achieve this by invoking ./generate.sh.

The fact that CI passes implies that we are missing an automated check to ensure that the example code is in sync; I'll add a task to track this improvement.

[jonny-improbable]

Same as #124, @virtuald could you please rebase your changes against the latest master, this should highlight the discrepancy with the generated code being out of sync.