add missing return type (#261)

src/procedures/wildcam/wildcam.js

@@ -259,6 +259,7 @@ Wildcam.search = function (
  * @param {Date=} stopDate The latest date to include in the results. If omitted, no stopping cutoff is used for filtering.
  * @param {Species=} species Filters results to only entries which contained the requested species. If omitted, no species filtering is performed.
  * @param {Object=} camera Filters results to only entries taken by a specific camera. If omitted, no camera-based filtering is performed.
+ * @returns {Array<Object>} All data entries matching the search, in chronological order
  */
 Wildcam.searchByCamera = function (
   startDate = null,