add super resolution

tests/test_super_resolution.py

@@ -0,0 +1,10 @@
+# -*- coding: utf-8 -*-
+from rudalle.pipelines import super_resolution
+
+
+def test_super_resolution(sample_image, realesrgan):
+    img = sample_image.copy()
+    img = img.resize((32, 32))
+    sr_img = super_resolution([img], realesrgan)[0]
+    assert sr_img.size[0] == 32*2
+    assert sr_img.size[1] == 32*2