add newline to required files

Co-Simulation/PTV-Vissim/.gitignore

@@ -4,4 +4,4 @@ venv
 *.results
 *.inp0
 *.layx
-*.err
+*.err

Co-Simulation/PTV-Vissim/data/vtypes.json

@@ -40,4 +40,4 @@
         "vehicle.diamondback.century",
         "vehicle.bh.crossbike"
     ]
-}
+}

Co-Simulation/PTV-Vissim/vissim_integration/bridge_helper.py

@@ -133,4 +133,4 @@ class BridgeHelper(object):
         else:
             logging.error(
                 'vissim type %s unknown. No vehicle will be spawned in carla', type_id)
-            return None
+            return None