• Add ExclusiveNeither, FindKnownFirstTrue, Ne128
• Add 16-bit SumOfLanes/ReorderWidenMulAccumulate/ReorderDemote2To
• Faster sort for low-entropy input, improved pivot selection
• Add GN build system, Highway FAQ, k32v32 type to vqsort
• CMake: Support find_package(GTest), add rvv-inl.h, add HWY_ENABLE_TESTS
• Fix MIPS and C++20 build, Apple LLVM 10.3 detection, EMU128 AllTrue on RVV
• Fix missing exec_prefix, RVV build, warnings, libatomic linking
• Work around GCC 10.4 issue, disabled RDCYCLE, arm7 with vfpv3
• Documentation/example improvements
• Support static dispatch to SVE2_128 and SVE_256