Legacy deploy: error thrown when pulling a project with no workflows

[josephjclark]

When pulling a project with no workflows, this wierd error is thrown:

[CLI] ♦ Downloading the project spec (as YAML) from the server.
[CLI] ✘ ERROR: invalid spec
[CLI] ✘ [
  {
    "context": {
      "workflows": null
    },
    "message": "project: must provide at least one workflow",
    "path": "workflows"
  }
]

There's no reason to be strict about this

The pull does actually work OK as well, so if anything it's a warning more than an error

This is probably a wontfix as the 2.0 deploy is coming and this is pretty edge-casey