fix: upgrade dompurify from 2.2.9 to 2.3.0

Snyk has created this PR to upgrade dompurify from 2.2.9 to 2.3.0.

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

See this project in Snyk:
https://app.snyk.io/org/anikethsaha/project/836f877b-b98e-47ed-89fc-554e9b2e146d?utm_source=github&utm_medium=upgrade-pr

Author: snyk-bot

package-lock.json

@@ -54,7 +54,7 @@
     "*.js": "eslint --fix"
   },
   "dependencies": {
-    "dompurify": "^2.2.9",
+    "dompurify": "^2.3.0",
     "marked": "^1.2.9",
     "medium-zoom": "^1.0.6",
     "opencollective-postinstall": "^2.0.2",