Update test_unit_tests.py version number check

Author: tmathern

tests/test_unit_tests.py

@@ -39,7 +39,7 @@
 
 class TestC2paSdk(unittest.TestCase):
     def test_sdk_version(self):
-        self.assertIn("0.55.0", sdk_version())
+        self.assertIn("0.58.0", sdk_version())
 
 
 class TestReader(unittest.TestCase):