Release v1.19.3

NOTE: This is a beta version; for the latest stable release, see v1.18.7 below.

Changes:

• Fix resource leak after a failed package read
• Fix package padding logic for v7/v9 packages
• Fix package path canonicalization
• Fix savegame debug dump not working from compressed streams
• Fix NRE when a pak could not be fully loaded
• GR2: Fix QTangent normal reflections being encoded incorrectly
• VT: Fix stitching logic for partial tiles
• Validator: Add support for disabling reference validation
• Validator: Add TreasureTable.txt to parsed stats files
• Validator: General diagnostic message improvement pass
• Validator: Fix incorrect stat enumerations path
• Validator: Fix incorrect line numbers in diagnostic messages