fix: package.json & yarn.lock to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-DOMPURIFY-8722251

Author: snyk-bot

package.json

@@ -11,7 +11,7 @@
     "calendar-link": "2.1.1",
     "date-fns": "2.28.0",
     "date-fns-tz": "1.3.4",
-    "dompurify": "2.3.8",
+    "dompurify": "3.2.4",
     "react": "17.0.2",
     "react-add-to-calendar": "0.1.5",
     "react-big-calendar": "0.40.1",