Remove V from get_version

Author: lyubomir atanasov

mailjet_rest/utils/version.py

@@ -10,4 +10,4 @@ def get_version(version=None):
         version = VERSION
     else:
         assert len(version) == 3
-    return 'v{0}.{1}.{2}'.format(*(x for x in version))
+    return '{0}.{1}.{2}'.format(*(x for x in version))