Upgrade to curveball v1 and fix PostgresQL compatibility issue

[ICTServ]

Please upgrade the dependencies. If you could add delete user/app UI and email verification feature it would make almost complete auth app since the it already has so many features. Thank you!

[evert]

I created some separate tickets to address these, they're all good ideas:

• Email verification feature #492
• Delete principal UI #491
• Upgrade to Curveball v1 #490

However I'm not sure what compatibility issue with postgres you are referring to, lmk if you have more details. Thanks!