Add qrcode converter

tests/test_qr_code.py

@@ -47,7 +47,9 @@
 
         self.assertEqual("image/png", img["mime-type"])
         self.assertRegex(
-            img["body"], r"[A-Za-z0-9+/=]+$", "The generated base64 body is incorrect"
+            img["body"],
+            r"[A-Za-z0-9+/=]+$",
+            "The generated base64 body is incorrect",
         )
 
     def test_qr_code_data_url(self):