Add scatter to zzz_shape_shift_vertical mock

Author: my-tien

test/image/mocks/zzz_shape_shift_vertical.json

@@ -8,6 +8,15 @@
                 1, 2, 3, 4
             ],
             "type": "bar"
+        },
+        {
+            "x": [
+                "A", "B", "C", "D"
+            ],
+            "y": [
+                3, 2, 4, 1
+            ],
+            "type": "scatter"
         }
     ],
     "layout": {