Upgrade `macrostrat.database` library dependencies to `psycopg` 3

[davenquinn]

psycopg2 bindings are used in the internals of the macrostrat.database library but are incompatible with Python 3.13. Updated PsycoPG version 3 bindings (in the psycopg package now) are simpler and better in several ways, so we should get these integrated to allow us to support Python 3.13.

[davenquinn]

Closed by #40