Enable npm test on Windows workflow

Author: minggangw

.github/workflows/windows-build-and-test.yml

@@ -64,3 +64,4 @@ jobs:
       run: |
         set RMW_IMPLEMENTATION=rmw_fastrtps_cpp
         call "c:\dev\${{ matrix.ros_distribution }}\ros2-windows\setup.bat"
+        npm test