Latest pg_cron on APT (1.0.2) does not work as expected in Postgres 9.6

I found apt.postgresql.org is still with 1.0.2-1.pgdg16.04+1 (BTW, my OS is Ubuntu 16.04 LTS), and I just noticed that even if I have installed it as instructed ( except promoting the server because I do not know what is "promote"), and all jobs will not be executed by time automatically.

So it is about the version of pg_cron or is it about the way I set it up?

PS: I am sure I have set up trust security level to local DB connections