Bump d3 from 5.15.0 to 5.16.0

Bumps [d3](https://github.com/d3/d3) from 5.15.0 to 5.16.0.
- [Release notes](https://github.com/d3/d3/releases)
- [Changelog](https://github.com/d3/d3/blob/master/CHANGES.md)
- [Commits](https://github.com/d3/d3/compare/v5.15.0...v5.16.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -6,7 +6,7 @@
     "bootstrap": "^4.1.3",
     "bootswatch": "^4.4.1",
     "chosen-js": "^1.8.7",
-    "d3": "^5.15.0",
+    "d3": "^5.16.0",
     "d3-tip": "^0.9.1",
     "highlight.js": "^9.18.0",
     "jquery": "^3.4.1",