Improve mock with CommandResult

tests/targets/test_ios.py

@@ -5,6 +5,7 @@
 
 import pytest
 
+from buildozer.buildops import CommandResult
 from buildozer.exceptions import BuildozerCommandException
 from buildozer.targets.ios import TargetIos
 from tests.targets.utils import (
@@ -183,7 +184,7 @@ def test_unlock_keychain_wrong_password(self):
             m_getpass.return_value = "password"
             # the `security unlock-keychain` command returned an error
             # hence we'll get prompted to enter the password
-            m_cmd.return_value = (None, None, 123)
+            m_cmd.return_value = CommandResult(None, None, 123)
             target._unlock_keychain()
         # fmt: on
         assert m_getpass.call_args_list == [