v0.8.0

Added

• Add method with_policy_id() to ua::AnonymousIdentityToken and ua::UserNameIdentityToken.
• Add method ua::UserNameIdentityToken::with_encryption_algorithm().
• Add ua::X509IdentityToken and ua::IssuedIdentityToken.
• Breaking: Add enum variants X509 and Issued to UserIdentityToken.

Changed

• Breaking: Expect ua::String, ua::ByteString in ua::UserNameIdentityToken::with_user_name(), ua::UserNameIdentityToken::with_password().