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 c81f98f..3b3d9bc 100644
--- a/tests/data_files/cli-rsa-sha256.crt
+++ b/tests/data_files/cli-rsa-sha256.crt
@@ -1,7 +1,7 @@
 -----BEGIN CERTIFICATE-----
 MIIDPzCCAiegAwIBAgIBBDANBgkqhkiG9w0BAQsFADA7MQswCQYDVQQGEwJOTDER
 MA8GA1UECgwIUG9sYXJTU0wxGTAXBgNVBAMMEFBvbGFyU1NMIFRlc3QgQ0EwHhcN
-MTEwMjEyMTQ0NDA2WhcNMjEwMjEyMTQ0NDA2WjA8MQswCQYDVQQGEwJOTDERMA8G
+MTkwMjEwMTQ0NDA2WhcNMjkwMjEwMTQ0NDA2WjA8MQswCQYDVQQGEwJOTDERMA8G
 A1UECgwIUG9sYXJTU0wxGjAYBgNVBAMMEVBvbGFyU1NMIENsaWVudCAyMIIBIjAN
 BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyHTEzLn5tXnpRdkUYLB9u5Pyax6f
 M60Nj4o8VmXl3ETZzGaFB9X4J7BKNdBjngpuG7fa8H6r7gwQk4ZJGDTzqCrSV/Uu
@@ -11,10 +11,10 @@
 /DZrtenNLQNiTrM9AM+vdqBpVoNq0qjU51Bx5rU2BXcFbXvI5MT9TNUhXwIDAQAB
 o00wSzAJBgNVHRMEAjAAMB0GA1UdDgQWBBRxoQBzckAvVHZeM/xSj7zx3WtGITAf
 BgNVHSMEGDAWgBS0WuSls97SUva51aaVD+s+vMf9/zANBgkqhkiG9w0BAQsFAAOC
-AQEAlHabem2Tu69VUN7EipwnQn1dIHdgvT5i+iQHpSxY1crPnBbAeSdAXwsVEqLQ
-gOOIAQD5VIITNuoGgo4i+4OpNh9u7ZkpRHla+/swsfrFWRRbBNP5Bcu74AGLstwU
-zM8gIkBiyfM1Q1qDQISV9trlCG6O8vh8dp/rbI3rfzo99BOHXgFCrzXjCuW4vDsF
-r+Dao26bX3sJ6UnEWg1H3o2x6PpUcvQ36h71/bz4TEbbUUEpe02V4QWuL+wrhHJL
-U7o3SVE3Og7jPF8sat0a50YUWhwEFI256m02KAXLg89ueUyYKEr6rNwhcvXJpvU9
-giIVvd0Sbjjnn7NC4VDbcXV8vw==
+AQEAXidv1d4pLlBiKWED95rMycBdgDcgyNqJxakFkRfRyA2y1mlyTn7uBXRkNLY5
+ZFzK82GCjk2Q2OD4RZSCPAJJqLpHHU34t71ciffvy2KK81YvrxczRhMAE64i+qna
+yP3Td2XuWJR05PVPoSemsNELs9gWttdnYy3ce+EY2Y0n7Rsi7982EeLIAA7H6ca4
+2Es/NUH//JZJT32OP0doMxeDRA+vplkKqTLLWf7dX26LIriBkBaRCgR5Yv9LBPFc
+NOtpzu/LbrY7QFXKJMI+JXDudCsOn8KCmiA4d6Emisqfh3V3485l7HEQNcvLTxlD
+6zDQyi0/ykYUYZkwQTK1N2Nvlw==
 -----END CERTIFICATE-----