docs(document): add missing params for toObject()

Re: #6637

lib/document.js

@@ -2362,8 +2362,8 @@ Document.prototype.$toObject = function(options, json) {
  *
  * ####Options:
  *
- * - `getters` apply all getters (path and virtual getters)
- * - `virtuals` apply virtual getters (can override `getters` option)
+ * - `getters` apply all getters (path and virtual getters), defaults to false
+ * - `virtuals` apply virtual getters (can override `getters` option), defaults to false
  * - `minimize` remove empty objects (defaults to true)
  * - `transform` a transform function to apply to the resulting document before returning
  * - `depopulate` depopulate any populated paths, replacing them with their original refs (defaults to false)
@@ -2466,6 +2466,12 @@ Document.prototype.$toObject = function(options, json) {
  * _During save, no custom options are applied to the document before being sent to the database._
  *
  * @param {Object} [options]
+ * @param {Boolean} [options.getters=false] if true, apply all getters, including virtuals
+ * @param {Boolean} [options.virtuals=false] if true, apply virtuals. Use `{ getters: true, virtuals: false }` to just apply getters, not virtuals
+ * @param {Boolean} [options.minimize=true] if true, omit any empty objects from the output
+ * @param {Function|null} [options.transform=null] if set, mongoose will call this function to allow you to transform the returned object
+ * @param {Boolean} [options.depopulate=false] if true, replace any conventionally populated paths with the original id in the output. Has no affect on virtual populated paths.
+ * @param {Boolean} [options.versionKey=true] if false, exclude the version key (`__v` by default) from the output
  * @return {Object} js object
  * @see mongodb.Binary http://mongodb.github.com/node-mongodb-native/api-bson-generated/binary.html
  * @api public