Provide references for CVE-2020-4068.
Where can I find more information about CVE-2020-4068?
References are available at: https://github.com/kylebrowning/APNSwift/security/advisories/GHSA-qh2w-vjxg-mjcg, https://github.com/kylebrowning/APNSwift/issues/31, https://github.com/kylebrowning/APNSwift/pull/32, https://github.com/kylebrowning/APNSwift/commit/97fa7f69dcdd89168fff84e0ba8f999881ee3d3f.