Additions:

• Define gsl_MAYBE_UNUSED_MEMBER for [[maybe_unused]] annotations on members (https://github.com/gsl-lite/gsl-lite/commit/34ba5141492a88912e2055e08cd1bdd6714431c5)
• Support not_null<void*> (#341, thanks to @BenFrantzDale)
• Support not_null<> for unique_ptr<void, D> and shared_ptr<void> (#349, thanks to @BenFrantzDale)

Changes:

• For modern (≥v1) defaults, finally(), on_return(), and on_error() are now implemented without virtual function calls (#342)
• Deprecate finally(), on_return(), and on_error() for pre-C++11 (#342)
• narrow_failfast<>() now uses gsl_Assert() rather than gsl_Expects() to express the contract check (#351)
• std::hash<gsl_lite::byte> now forwards to std::hash<unsigned char> (#343)
• Add Continuous Integration for GCC 13, Clang 17 to 19, and for NVCC 12.6; remove CI for GCC 10 on macOS and for Apple Clang 12.0.5 and earlier (#351)

Fixes:

• std::terminate() cannot be called from CUDA device code, but the call may go undetected due to a NVCC issue; for !gsl_CONFIG( NARROW_THROWS_ON_TRUNCATION ), narrow<>() now makes sure that the program is terminated by issuing a trap instruction if std::terminate() is not available (#351, thanks to @pauleonix for helping track this down)
• narrow<>() no longer responds to gsl_CONFIG_CONTRACT_VIOLATION_THROWS because it does not do contract checking; therefore, it now plainly fails to compile if gsl_CONFIG_NARROW_THROWS_ON_TRUNCATION is set to 1 even though exceptions are unavailable (e.g. in device code) (#351)
• Fix issues in test suite (#338, thanks to @musicinmybrain)