v1.5.0: Bug fixes and improvements

• Update next-session (#70) superseded by #92
• fix: small typos, should send status with res not req (#74)
• Use the new useSWRInfinite and refresh posts on interval (#80)
• Use express-session (#92)
• Refactor mailer (def142f)
• Use absolute imports and move files (78c8379)
• MongoDB client caching strategy using global (5b2523e)
• cache user data (9ff6fd1)
• Some deps upgrades

There has been a hiatus due to me being busy, but I hope to restart this project soon.