fix: upgrade d3 from 7.1.1 to 7.8.5

Snyk has created this PR to upgrade d3 from 7.1.1 to 7.8.5.

See this package in npm:
https://www.npmjs.com/package/d3

See this project in Snyk:
https://app.snyk.io/org/grosscol/project/14486611-f583-41e7-968c-0fff2307a69f?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -23,7 +23,7 @@
     "bootstrap": "^4.6.0",
     "colors": "1.4.0",
     "core-js": "^3.6.5",
-    "d3": "^7.1.1",
+    "d3": "^7.8.5",
     "devbridge-autocomplete": "^1.4.11",
     "igv": "^2.10.4",
     "just-clone": "^3.2.1",