Expiring User Upgrades 2.6.2

• Require php 7.2+
• Fix recurring upgrades did not send expiry notices >24 hours before they where due to expire
• Shorten various notification alerts
• Improve scalability of notifying large number of users about expiring upgrades
• Improve @NixFifity's Gift Upgrades integration. Titles for gifted upgrades/subscriptions are prefixed with "gifted" (editable phrase).
• Add per-user upgrade "Exclude payment providers from notifications" option to skip user upgrades which have been purchased by the relevant payment provider.

• Prevent errors when user email preferences have not been correctly setup by the add-on installer
• Improve installer to ensure user email preferences are setup as expected

• Fix "Extend Upgrade button" option not being respected
• Require XenForo 2.1+
• Require php 7.0+
• Now depends on Standard Library by Xon (v1.1.0+)
• Confirm XF2.2+ support

• Fix incorrect access level when extending user changelog

• Fix user change log showing raw column names added by this add-on

• Fix poor phrasing when reporting why an upgrade can not be extended

• Fix conversation phrases for payment reversal of extended upgrades/subscriptions
• Update 'Notify user by' list of phrases to include payment reversals for extended upgrades/subscriptions

• Fix "Leave notify conversation on submit" applying to the recipient and not the sender
• Fix 'extend' button not working as expected

• Fix "can extend" check for user upgrades created in XF1.x
• Fix "Shows the reason an upgrade can not be extended" option not actually showing anything
• Add icon the add-on options

• Correctly detect existing subscription for the "Notify user upon extending a recurring user upgrade/subscription?" feature