feat: Upgraded to latest version of singer_sdk, fixed upper case columns with column alters

[visch]

Closes #152, #103, #124, #2

[visch]

@BuzzCutNorman tried this PR here https://meltano.slack.com/archives/C01RKUVUG4S/p1688075229854589?thread_ts=1688060563.197079&cid=C01RKUVUG4S , I thought this would address an issue like

cur.execute(b''.join(parts)) cmd_type=elb consumer=True name=target-postgres producer=False stdio=stderr string_id=target-postgres
2023-06-29T20:23:10.757683Z [info     ] sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) server closed the connection unexpectedly cmd_type=elb consumer=True name=target-postgres producer=False stdio=stderr string_id=target-postgres

By using Pooling properly but we're still hitting it. Going to take a look a bit deeper but wanted to capture this somewhere

[visch]

@BuzzCutNorman tried this PR here https://meltano.slack.com/archives/C01RKUVUG4S/p1688075229854589?thread_ts=1688060563.197079&cid=C01RKUVUG4S , I thought this would address an issue like

cur.execute(b''.join(parts)) cmd_type=elb consumer=True name=target-postgres producer=False stdio=stderr string_id=target-postgres
2023-06-29T20:23:10.757683Z [info     ] sqlalchemy.exc.OperationalError: (psycopg2.OperationalError) server closed the connection unexpectedly cmd_type=elb consumer=True name=target-postgres producer=False stdio=stderr string_id=target-postgres

By using Pooling properly but we're still hitting it. Going to take a look a bit deeper but wanted to capture this somewhere

@BuzzCutNorman can you try this again?

[edgarrmondragon]

This looks great 😁