Update Definition

Update the alias of a definition.

POST `/revisions/:id/data` (Command: `update_definition`)

Parameter	Type	Required	Description
`engine`	string	Yes	Must be `workflow_blobhub`.
`command`	string	Yes	Must be `update_definition`.
`definition_id`	string	Yes	The ID of the definition.
`alias`	string	Yes	New unique alias.

Returns an empty JSON object upon success.

{
  "engine": "workflow_blobhub",
  "command": "update_definition",
  "definition_id": "def_001",
  "alias": "new-process-name"
}