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/cli-rsa-sha256.crt b/tests/data_files/cli-rsa-sha256.crt
index a0fc11e..2adaebd 100644
--- a/tests/data_files/cli-rsa-sha256.crt
+++ b/tests/data_files/cli-rsa-sha256.crt
@@ -1,7 +1,7 @@
 -----BEGIN CERTIFICATE-----
 MIIDhTCCAm2gAwIBAgIBBDANBgkqhkiG9w0BAQsFADA7MQswCQYDVQQGEwJOTDER
 MA8GA1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwHhcN
-MTcwNTA1MTMwNzU5WhcNMjcwNTA2MTMwNzU5WjA8MQswCQYDVQQGEwJOTDERMA8G
+MTkwMzEyMTAwNDAxWhcNMjkwMzEyMTAwNDAxWjA8MQswCQYDVQQGEwJOTDERMA8G
 A1UECgwIUG9sYXJTU0wxGjAYBgNVBAMMEVBvbGFyU1NMIENsaWVudCAyMIIBIjAN
 BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyHTEzLn5tXnpRdkUYLB9u5Pyax6f
 M60Nj4o8VmXl3ETZzGaFB9X4J7BKNdBjngpuG7fa8H6r7gwQk4ZJGDTzqCrSV/Uu
@@ -11,11 +11,11 @@
 /DZrtenNLQNiTrM9AM+vdqBpVoNq0qjU51Bx5rU2BXcFbXvI5MT9TNUhXwIDAQAB
 o4GSMIGPMB0GA1UdDgQWBBRxoQBzckAvVHZeM/xSj7zx3WtGITBjBgNVHSMEXDBa
 gBS0WuSls97SUva51aaVD+s+vMf9/6E/pD0wOzELMAkGA1UEBhMCTkwxETAPBgNV
-BAoMCFBvbGFyU1NMMRkwFwYDVQQDDBBQb2xhclNTTCBUZXN0IENBggEAMAkGA1Ud
-EwQCMAAwDQYJKoZIhvcNAQELBQADggEBAC7yO786NvcHpK8UovKIG9cB32oSQQom
-LoR0eHDRzdqEkoq7yGZufHFiRAAzbMqJfogRtxlrWAeB4y/jGaMBV25IbFOIcH2W
-iCEaMMbG+VQLKNvuC63kmw/Zewc9ThM6Pa1Hcy0axT0faf1B/U01j0FIcw/6mTfK
-D8w48OIwc1yr0JtutCVjig5DC0yznGMt32RyseOLcUe+lfq005v2PAiCozr5X8rE
-ofGZpiM2NqRPePgYy+Vc75Zk28xkRQq1ncprgQb3S4vTsZdScpM9hLf+eMlrgqlj
-c5PLSkXBeLE5+fedkyfTaLxxQlgCpuoOhKBm04/R1pWNzUHyqagjO9Q=
+BAoMCFBvbGFyU1NMMRkwFwYDVQQDDBBQb2xhclNTTCBUZXN0IENBggEDMAkGA1Ud
+EwQCMAAwDQYJKoZIhvcNAQELBQADggEBAH78VDMNqHyxX1Tdss1Dcbx475Gei+OO
+Pv5Z4EPLg/0Y7YgBoXI+3lM17CVhT9w5epPaSYmxzthtK0QSuJaS6Jgt7eHaQITT
+3KXcMPqluwCy1ddr1IRYW9dXCFtgaRNJibpDuuAwf8T2tCSsY6EaYDoNgv2y6ogu
+rh5/q7ca7Q4ENv3H+xq1V77baDa0QZijdPQ+WR+NTKPU0D8mDKlWLNSCpuItQ4Tu
+AYzCCTosMTHlGQJ/7BkhqChH0MLTCIlUktVjY7z/4XfOWYVUMPdqUJWwfz6AgEXL
+wjAFhq2OPrmyY2u8mrcVqpArDukPi9hOX5jzJtJaQVf4srpOL8e4nYg=
 -----END CERTIFICATE-----