They were thought to be macOS only but xtro corrected me, they are
new in iOS 10.3 even if some existed previously.
references (xtro):
!missing-pinvoke! SecCertificateCopyCommonName is not bound
!missing-pinvoke! SecCertificateCopyEmailAddresses is not bound
!missing-pinvoke! SecCertificateCopyNormalizedIssuerSequence is not bound
!missing-pinvoke! SecCertificateCopyNormalizedSubjectSequence is not bound
!missing-pinvoke! SecCertificateCopyPublicKey is not bound
!missing-pinvoke! SecCertificateCopySerialNumber is not bound
reference:
https://bugzilla.xamarin.com/show_bug.cgi?id=52505
* Fixed reports of xtro tests
* Fixed some members that are @required members of an existing protocol (XAMCORE_4_0)
* Added some new typo fixes to Intrespection tests
* Fixed SCNNode.EnumerateChildNodes delegate signature