Add topicctl as a project using go-prompt.

README.md

@@ -51,6 +51,7 @@ func main() {
 * [docker-slim/docker-slim: Don't change anything in your Docker container image and minify it by up to 30x (and for compiled languages even more) making it secure too! (free and open source)](https://github.com/docker-slim/docker-slim)
 * [rueyaa332266/ezcron: Ezcron is a CLI tool, helping you deal with cron expression easier.](https://github.com/rueyaa332266/ezcron)
 * [qingstor/qsctl: Advanced command line tool for QingStor Object Storage.](https://github.com/qingstor/qsctl)
+* [segmentio/topicctl: Tool for declarative management of Kafka topics](https://github.com/segmentio/topicctl)
 * (If you create a CLI utility using go-prompt and want your own project to be listed here, please submit a GitHub issue.)
 
 ## Features