in lib/logstash-docket/source.rb [82:88]
def release_tags
@tags ||= begin
fail('octokit github client required') if @octokit.nil?
Set.new(@octokit.tags("#{org}/#{repo}").map(&:name).select{|t| t[%r{\Av\d+\.\d+\.\d+}] })
end
end