Dependencies: Update to `psycopg>=3.0` #280

Job	Run time
pre-commit	31s
ubuntu-apt-2004 (3.7)	5m 14s
ubuntu-apt (3.8)	5m 16s
multi-conda (3.8, macos-12)	1m 7s
ubuntu-apt (3.11)	5m 15s
ubuntu-postgres-action (3.9, testpw)	5m 14s
multi-conda (3.8, windows-2022)	1m 10s
ubuntu-postgres-service (3.9, testpw)	5m 14s
	29m 1s

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