Pin PostgreSQL CI images to the latest versions
This should help avoid breaking changes made in the Docker images (such as #205820 (closed)).
We also ship PostgreSQL 10.12 with Omnibus, so use this.
Edited by Stan Hu
This should help avoid breaking changes made in the Docker images (such as #205820 (closed)).
We also ship PostgreSQL 10.12 with Omnibus, so use this.