add keepLatest to the API docs

Author: machty

API.md

@@ -26,6 +26,7 @@ under the [Task Property API docs](TaskProperty.html).
 - [restartable](TaskProperty.html#restartable)
 - [enqueue](TaskProperty.html#enqueue)
 - [drop](TaskProperty.html#drop)
+- [keepLatest](TaskProperty.html#keepLatest)
 - [maxConcurrency](TaskProperty.html#maxConcurrency)
 
 

addon/-task-property.js

@@ -393,6 +393,15 @@ Object.assign(TaskProperty.prototype, propertyModifiers, {
    * @instance
    */
 
+  /**
+   * Configures the task to drop all but the most recently
+   * performed {@linkcode TaskInstance }.
+   *
+   * @method keepLatest
+   * @memberof TaskProperty
+   * @instance
+   */
+
   /**
    * Sets the maximum number of task instances that are allowed
    * to run at the same time. By default, with no task modifiers