refactor(all): add test file

data/reports/scatter/three_traces_style4.json

+[
+  {
+    "name": "trace1",
+    "fill": "tozeroy"
+  },
+  {
+    "name": "trace2",
+    "fill": "tonexty"
+  },
+  {
+    "name": "trace3",
+    "fill": "tozeroy",
+    "mode": "none"
+  }
+]