Update test_simulate.py

Author: cybergalactic

tests/test_simulate.py

@@ -7,10 +7,9 @@
 """ 
 
 import matplotlib.pyplot as plt
-from python_vehicle_simulator import *
+from python_vehicle_simulator.lib import *
 import python_vehicle_simulator.vehicles as vehicles
 import pytest
-import matplotlib.pyplot as plt
 
 sampleTime = 0.02 # sample time
 N = 10000 # number of samples