Update certificates to expire in 2029

Update certificates that expire on 2021, to prolong their validity,
to make tests pass three years ahead.
diff --git a/tests/data_files/test-ca_utf8.crt b/tests/data_files/test-ca_utf8.crt
index e8b537c..2dadc77 100644
--- a/tests/data_files/test-ca_utf8.crt
+++ b/tests/data_files/test-ca_utf8.crt
@@ -1,7 +1,7 @@
 -----BEGIN CERTIFICATE-----
-MIIDQTCCAimgAwIBAgIBAzANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER
+MIIDhzCCAm+gAwIBAgIBAzANBgkqhkiG9w0BAQUFADA7MQswCQYDVQQGEwJOTDER
 MA8GA1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwHhcN
-MTEwMjEyMTQ0NDAwWhcNMjEwMjEyMTQ0NDAwWjA7MQswCQYDVQQGEwJOTDERMA8G
+MTkwMjExMTM0NTE0WhcNMjkwMjExMTM0NTE0WjA7MQswCQYDVQQGEwJOTDERMA8G
 A1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwggEiMA0G
 CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDA3zf8F7vglp0/ht6WMn1EpRagzSHx
 mdTs6st8GFgIlKXsm8WL3xoemTiZhx57wI053zhdcHgH057Zk+i5clHFzqMwUqny
@@ -9,12 +9,13 @@
 YMPGn8u67GB9t+aEMr5P+1gmIgNb1LTV+/Xjli5wwOQuvfwu7uJBVcA0Ln0kcmnL
 R7EUQIN9Z/SG9jGr8XmksrUuEvmEF/Bibyc+E1ixVA0hmnM3oTDPb5Lc9un8rNsu
 KNF+AksjoBXyOGVkCeoMbo4bF6BxyLObyavpw/LPh5aPgAIynplYb6LVAgMBAAGj
-UDBOMAwGA1UdEwQFMAMBAf8wHQYDVR0OBBYEFLRa5KWz3tJS9rnVppUP6z68x/3/
-MB8GA1UdIwQYMBaAFLRa5KWz3tJS9rnVppUP6z68x/3/MA0GCSqGSIb3DQEBBQUA
-A4IBAQABE3OEPfEd/bcJW5ZdU3/VgPNS4tMzh8gnJP/V2FcvFtGylMpQq6YnEBYI
-yBHAL4DRvlMY5rnXGBp3ODR8MpqHC6AquRTCLzjS57iYff//4QFQqW9n92zctspv
-czkaPKgjqo1No3Uq0Xaz10rcxyTUPrf5wNVRZ2V0KvllvAAVSzbI4mpdUXztjhST
-S5A2BeWQAAOr0zq1F7TSRVJpJs7jmB2ai/igkh1IAjcuwV6VwlP+sbw0gjQ0NpGM
-iHpnlzRAi/tIbtOvMIGOBU2TIfax/5jq1agUx5aPmT5TWAiJPOOP6l5xXnDwxeYS
-NWqiX9GyusBZjezaCaHabjDLU0qQ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 -----END CERTIFICATE-----