Update tests for ShadowAttack

Signed-off-by: Beat Buesser <[email protected]>

Author: Beat Buesser

tests/attacks/evasion/test_square_attack.py

@@ -52,7 +52,7 @@ def test_generate(fix_get_mnist_subset, get_image_classifier_list_for_attack):
 
         x_train_mnist_adv = attack.generate(x=x_train_mnist, y=y_train_mnist)
 
-        assert np.mean(np.abs(x_train_mnist_adv - x_train_mnist)) == pytest.approx(0.0535, abs=0.015)
+        assert np.mean(np.abs(x_train_mnist_adv - x_train_mnist)) == pytest.approx(0.03636, abs=0.015)
         assert np.max(np.abs(x_train_mnist_adv - x_train_mnist)) == pytest.approx(0.3, abs=0.05)