fix test_get_version_message

tests/test_craw.py

@@ -33,7 +33,7 @@ class MyTestCase(CRAWTest):
 
     def test_get_version_message(self):
         craw_version = craw.__version__
-        craw.__version__ = 1.0
+        craw.__version__ = "1.0"
         try:
             self.assertTrue(craw.get_version_message().startswith("craw 1.0 | Python 3."))
         finally: