updating DIRECTORY.md

Author: github-actions

DIRECTORY.md

@@ -133,6 +133,8 @@
       * [Test Car Pooling](https://github.com/BrianLusina/PythonSnips/blob/master/algorithms/intervals/car_pooling/test_car_pooling.py)
     * Count Days
       * [Test Count Days Without Meetings](https://github.com/BrianLusina/PythonSnips/blob/master/algorithms/intervals/count_days/test_count_days_without_meetings.py)
+    * Data Stream
+      * [Test Data Stream As Disjoint Intervals](https://github.com/BrianLusina/PythonSnips/blob/master/algorithms/intervals/data_stream/test_data_stream_as_disjoint_intervals.py)
     * Employee Free Time
       * [Interval](https://github.com/BrianLusina/PythonSnips/blob/master/algorithms/intervals/employee_free_time/interval.py)
       * [Test Employee Free Time](https://github.com/BrianLusina/PythonSnips/blob/master/algorithms/intervals/employee_free_time/test_employee_free_time.py)