Update postgresql to 42.2.18 or spring-boot-starter-parent to 2.3.5.RELEASE

During Bugfest test, we noticed lots of following error in database log. Did a quick search and it looks like postgresql jar needs to updated. FOLIO modules currently use spring-boot-starter-parent 2.3.4.RELEASE which uses postgresql 42.2.16. Updating spring-boot-starter-parent to 2.3.5.RELEASE or later will bring in at least postgresql 42.2.18 that should have fixed the issue. See postgresql release notes.
 

FATAL: unsupported frontend protocol 1234.5680: server supports 2.0 to 3.0