add pytest in automatic docking

Signed-off-by: Hyungyu Kim <[email protected]>

Author: GyuH13

turtlebot3_automatic_parking/setup.py

@@ -37,6 +37,7 @@
         'Examples of Different TurtleBot3 Usage.'
     ),
     license='Apache License, Version 2.0',
+    tests_require=['pytest'],
     entry_points={
         'console_scripts': [
             'turtlebot3_automatic_parking = \