Merge pull request #5708 from plotly/fix3518-es6-import

Fix ES6 import

Author: archmoj

Diff for: devtools/test_dashboard/index.html

@@ -20,7 +20,7 @@
   <div id="snapshot"></div>
 
   <script src="../../node_modules/mathjax/MathJax.js?config=TeX-AMS-MML_SVG"></script>
-  <script id="source" src="../../build/plotly.js" charset="utf-8"></script>
-  <script src="../../build/test_dashboard-bundle.js" charset="utf-8"></script>
+  <script charset="utf-8" id="source"  type="module">import "../../build/plotly.js"</script>
+  <script charset="utf-8" src="../../build/test_dashboard-bundle.js"></script>
 </body>
 </html>

Diff for: package-lock.json

@@ -65,7 +65,7 @@
     ]
   },
   "dependencies": {
-    "@plotly/d3": "^3.5.18",
+    "@plotly/d3": "^3.6.0",
     "@plotly/d3-sankey": "0.7.2",
     "@plotly/d3-sankey-circular": "0.33.1",
     "@plotly/point-cluster": "^3.1.9",