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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-MARKED-584281

Author: snyk-bot

package-lock.json

@@ -58,7 +58,7 @@
   },
   "dependencies": {
     "dompurify": "^2.0.8",
-    "marked": "^0.7.0",
+    "marked": "^1.1.1",
     "medium-zoom": "^1.0.5",
     "opencollective-postinstall": "^2.0.2",
     "prismjs": "^1.19.0",