v6.0.0

• Breaking change: Now requires at least Node.js 10.x, this as Node.js 8.x only have a short time left in its LTS
• Breaking change: This project now uses INSERT ... ON CONFLICT, more popularly known as UPSERT. This is only supported on PostgreSQL version 9.5 and above.
• Update pg-promise dev dependency to 9.x
• Listen on pool errors. Fixes #29
• Lots of dev dependency updates

v5.0.0...v6.0.0