hey team, I noticed some Travis CI build has icon `cron`[1][2] which means it triggered by cron job instead of git commit.
Just want to know is there any reason for Dubbo CI has this configuration? [1]https://docs.travis-ci.com/user/cron-jobs/ [2]https://travis-ci.org/apache/incubator-dubbo/builds/399595876 Regards, Yunkun
