Zcrypto does not represent the "critical" of Issuer Alternative Name

[GOODPWDCETCSZ]

Env: Ubuntu x64

Go version: 1.13, 1.15

Reproduce: ./zcertificate seed-73s19-723s32 .pem

Expected result:
similar to

X509v3 Issuer Alternative Name: critical
                email:a@b.com, DNS:www.c.com, URI:http://www.b.gov/index.htm, IP Address:169.253.153.151, IP Address:FE80:6789:A63A:E94C:791A:B0E5:8F97:1686

Actual result:

"issuer_alt_name": {
      "dns_names": [
        "www.c.com"
      ],
      "email_addresses": [
        "a@b.com"
      ],
      "ip_addresses": [
        "169.253.153.151",
        "fe80:6789:a63a:e94c:791a:b0e5:8f97:1686"
      ],
      "uniform_resource_identifiers": [
        "http://www.b.gov/index.htm"
      ]
    },

Attachment
seed-73s19-723s32.zip