tf converter test fix

Author: djherbis

tests/test_tensorflowjs.py

@@ -6,13 +6,13 @@ class TestTensorflowjs(unittest.TestCase):
     def test_version(self):
         result = subprocess.run([
                 'tensorflowjs_converter',
-                '--version',
+                '--help',
             ],
             stdout=subprocess.PIPE,
             stderr=subprocess.PIPE,
         )
 
-        print("tensorflowjs_converter version: ", result)
+        print("tensorflowjs_converter help: ", result)
 
         self.assertEqual(0, result.returncode)
         self.assertIn(b'tensorflowjs', result.stdout)