v5.11.0

v5.11.0

Compatibility update matching Shopify Liquid v5.11.0.

Highlights

• Thread-safe rendering - Fixed concurrent map read/write panic (#2)
• Shopify v5.11.0 compatibility - strict2 error mode, snippet tag removed, render tag simplified
• Better error handling - New LiquidError interface, all 16 error types preserved

Breaking Changes

• {% snippet %} tag removed (reverted per Shopify Liquid v5.11.0)
• {% render %} now only accepts string literals: {% render 'name' %} not {% render variable %}

Added

• strict2 error mode as alias for rigid (backwards compatible)
• LiquidError interface for unified error handling

Fixed

• Concurrent template rendering now thread-safe with mutex protection
• strictFilters=true correctly raises UndefinedFilter errors
• Error type preservation (7 types were incorrectly converted to InternalError)