Add CertType.WILDCARD_CERTIFICATES
Add CertType.WILDCARD_CERTIFICATES

This makes it easy to check if a specific certificate is a wildcard
certificate:

> CertType.RAPIDSSL in CertType.WILDCARD_CERTIFICATES
False

> CertType.RAPIDSSL_WILDCARD in CertType.WILDCARD_CERTIFICATES
True

AntagonistHQ/openprovider.py