SwiftNIO SSL 2.28.0

What's Changed

SemVer Minor

• Modify TLS PSK API to handle the case when no hint is provided by the server by @martialln in #452
• Implement SSL_CTX_set_cert_cb by @AndrewBarba in #456

SemVer Patch

• Exclude privacy manifest when it isn't a resource by @glbrntt in #480
• Update BoringSSL to d0a175601b9e180ce58cb1e33649057f5c484146 by @Lukasa in #483

Other Changes

• Add release.yml by @FranzBusch in #479
• Update expired test certificate by @rnro in #482

New Contributors

• @martialln made their first contribution in #452
• @AndrewBarba made their first contribution in #456

Full Changelog: 2.27.2...2.28.0