Xero Invoice Sync 2.6.1

• XF2.3 compatibility
• Fix missing schema changes Dragonbyte eCommerce is installed after this add-on
• Fix invoices paid purely by store credit not syncing

• Require StandardLib v1.19.0+
• Various code cleanups
• php 8.4+ compatibility work. Not fully compatible yet as the dependant library used to communicate with Xero hasn't been updated yet

• On username change, only sync users who are known to have a xero account to avoid creating more contacts than are needed

• Username change improvements
  • Xero contacts can now be updated, not just created
  • Fix username changing not properly syncing to Xero
  • Fix triggering sync on existing user would cause errors