Add missing test dependency

Signed-off-by: Jacob Perron <[email protected]>

Author: jacobperron

stereo_image_proc/package.xml

@@ -39,6 +39,7 @@
   <test_depend>python3-opencv</test_depend>
   <test_depend>python_cmake_module</test_depend>
   <test_depend>rclpy</test_depend>
+  <test_depend>ros_testing</test_depend>
 
   <export>
     <build_type>ament_cmake</build_type>