code: function getOfferedVersions() {
    return promisify(regularUpdate)({
      url: 'https://api.wordpress.org/core/version-check/1.7/',
      intervalMillis: 24 * 3600 * 1000,
      json: true,
      scraper: json => json.offers.map(v => v.version),
    })
  }
docs: TODO: Incorporate this schema. const schema = Joi.object() .keys({ offers: Joi.array() .items( Joi.object() .keys({ version: Joi.string() .regex(/^\d+(\.\d+)?(\.\d+)?$/) .required(), }) .required() ) .required(), }) .required()