fix: upgrade dompurify from 2.2.7 to 2.4.1

Snyk has created this PR to upgrade dompurify from 2.2.7 to 2.4.1.

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

See this project in Snyk:
https://app.snyk.io/org/fecgov/project/2a97cddb-4b62-4d54-b18f-3b85d55a5e10?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -37,7 +37,7 @@
     "datatables.net": "^1.11.3",
     "datatables.net-responsive": "^2.2.7",
     "debug": "^3.2.6",
-    "dompurify": "^2.2.7",
+    "dompurify": "^2.4.1",
     "draft-js": "^0.11.7",
     "draftail": "^1.4.1",
     "es6-weak-map": "2.0.1",