Document cfssljson version verification

It seems there Is a way to verify cfssljson version now
2018-06-09 13:17:30 +02:00 · 2018-06-09 13:17:30 +02:00 · c9702a408e
parent b974042d95
commit c9702a408e
1 changed files with 13 additions and 1 deletions
--- a/docs/02-client-tools.md
+++ b/docs/02-client-tools.md
@ -66,7 +66,19 @@ Revision: dev
 Runtime: go1.6
 ```

-> The cfssljson command line utility does not provide a way to print its version.
+Verify `cfssljson` version 1.2.0 or higher is installed:
+
+```
+cfssljson -version
+```
+
+> output
+
+```
+Version: 1.2.0
+Revision: dev
+Runtime: go1.6
+```

 ## Install kubectl