Wi 9.1.2-beta

General

• Add missing write barriers across STD/STM (e9baa7b)
• Add integer (64-bit) validation (be8c4aa + d73e336)
• Update STM to use wi_state_real_to_int (e897cd3)
• Fix int64_t printing formats (649ef0a)
• Bump version to v9.1.2 and fix implicit conversion in _array_slice (f3b5aca)

Full Changelog: v9.1.1-beta...v9.1.2-beta