ROM-SQL Connection remains on development

[alex-lairan]

Describe the bug

ROM keep previous connections when rails reload the codebase.
Due to this behavior, after some changes you get a

PG::ConnectionBad: FATAL:  remaining connection slots are reserved for non-replication superuser connections

To Reproduce

A Rails app with ROM and ROM-SQL.

Change multiple times the codebase with the Rails server started.

Expected behavior

After each reload, ROM should clear his connections.

Your environment

• Affects my production application: NO
• Ruby version: 2.6.6
• OS: All