Capturing Logstash version as a field?

I notice on startup the Logstash version is reported, however I don't see this logged in a field like you see with Elastic beats. Is this some sort of environment variable that I can capture into a field instead?

Logstash startup outout:
[INFO ][logstash.runner ] Starting Logstash {"logstash.version"=>"6.4.2"}

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