fix: upgrade selfsigned and win-ca to resolve node-forge vulnerability

[katesaikishore]

Why

Snyk identified a high-severity vulnerability in [email protected] (CVE-2025-12816) within the auth0/ad-ldap-connector repository. This vulnerability is introduced via the selfsigned and win-ca dependencies.

What

• Upgraded selfsigned from ^1.10.4 to ^2.4.1.
• Upgraded win-ca from ^3.0.4 to ^3.5.1.

How

• Modified package.json to update the dependency versions.
• Ran npm install to update package-lock.json.

Tests

• Verified that node-forge is now at version 1.3.3 (secure) using npm list node-forge.
• Ran npm test.
  • Note: Some tests may fail due to weak hashing algorithms in the original test/certs.js file, which are rejected by newer Node.js versions.

Rollback

• Revert the changes in this PR.
• Downgrade selfsigned and win-ca to their previous versions.