@schematics/update/migrate/schema.json

Schematics specific to updating packages

{
  "$schema": "http://json-schema.org/schema",
  "id": "PostUpdateSchema",
  "type": "object",
  "properties": {
    "package": {
      "description": "The package to migrate.",
      "type": "string"
    },
    "collection": {
      "description": "The collection to load the migrations from.",
      "type": "string"
    },
    "from": {
      "description": "The version installed previously.",
      "type": "string"
    },
    "to": {
      "description": "The version to migrate to.",
      "type": "string"
    }
  },
  "required": ["package", "collection", "from", "to"]
}