Release for Vulkan SDK 1.2.162

• Add support for extensions:
  • VK_KHR_sampler_mirror_clamp_to_edge (iOS)
  • VK_KHR_timeline_semaphore
  • VK_EXT_descriptor_indexing (initial release limited to Metal Tier 1: 96/128 textures, 16 samplers)
  • VK_EXT_post_depth_coverage (macOS)
  • VK_EXT_private_data
  • VK_EXT_subgroup_size_control
  • VK_EXT_texture_compression_astc_hdr
  • VK_AMD_shader_image_load_store (macOS)
  • VK_IMG_format_pvrtc (macOS)
• Support the Mac Catalyst platform for iOS apps on macOS 11.0+,
  under both x86_64 and arm64 architectures.
• Re-enable MTLEvent-based semaphores and fix several MVKSync issues.
• Use VK_KHR_image_format_list to disable MTLTextureUsagePixelFormatView
  if only swizzles or sRGB conversion will be used for image views, improving
  performance on iOS by allowing Metal to use lossless texture compression.
• Handle device loss.
• Fix crash in vkUpdateDescriptorSets() when copying inline block descriptors.
• Fix Metal validation error when unused elements in an array of sampler are not populated by descriptors.
• Fix crashes in vkUseIOSurfaceMVK() on chroma sampling and double releasing ofMTLTexture.
• Fix potential drawable present race conditions.
• Fix crash in vkUpdateDescriptorSets() when copying inline block descriptors.
• Fix Metal validation error when unused elements in an array of sampler are not populated by descriptors.
• Move Metal drawable presentation from MTLCommandBuffer to MTLDrawable
  to improve performance and reduce blocking.
• Allow binding descriptor set using layout different than it was created with.
• Report VkPhysicalDeviceLimits::maxPerStageDescriptorStorageImages as Metal limit of 8.
• Increase per-stage texture count to 96 for A11 SoC's and above.
• Use variable descriptor count when determining descriptor binding count.
• Support setting sizes of SPIR-V unsized arrays.
• Support MTLStorageTypeMemoryless for Apple Silicon on Mac.
• Support Apple GPU pixel formats with Apple Silicon on Mac.
• Allow linear images on Apple GPUs in Blit and Clear commands.
• Apple family 7 GPUs (A14) on iOS support multisample layered rendering,
  as well as sampler border colors and the mirror clamp to edge sampler address mode.
• Set fill mode, depth bias, viewport, and scissor states before clearing attachments
• Disable culling for the duration of vkCmdClearAttachments()
• MVKDevice increase minimum OS for shared-storage textures.
• MVKDevice set properties for Apple Silicon GPUs on macOS.
• MVKQueue only create one GPUCaptureScope per queue.
• MVKSamplerYcbcrConversion always make sure there is one plane.
• MVKPhysicalDevice correct fragment input component limit.
• MVKPhysicalDevice set max visibility buffer size to 256 kiB where supported.
• MVKPhysicalDevice expose support for interpolation functions.
• MVKPhysicalDevice enable 3D compressed textures on iOS/tvOS, and forbid ETC2 and EAC
  3D textures on all platforms. Apple GPUs do not support 3D for those.
• MVKPhysicalDevice enable Apple family 7 features on iOS.
• MVKPhysicalDevice remove need to call initGPUInfoProperties() twice.
• MVKPhysicalDevice correct max descriptor set resources.
• MVKPhysicalDevice reduce maximum point size to 64.
• MVKPhysicalDevice enable strictLines for Intel and NVIDIA.
• MVKPhysicalDevice enable shaderResourceMinLod on iOS.
• MVKPhysicalDevice set correct subgroup properties.
• MVKPhysicalDevice enable texture swizzle on all Apple GPUs.
• MVKPipelineLayout only set configuration result if validating.
• MVKPipeline fix calculation of atomic image buffer addresses.
• MVKPipeline disable rasterization if culling both sides and don't try to add a fragment shader.
• MVKPipeline shorten vertex attribute format's length when stride < size.
• MVKGraphicsPipeline handle minSampleShading.
• MVKImage always use texel buffers for linear images in MTLHeaps.
• MVKImage make sure plane heap offsets are properly aligned.
• MVKImage always set the depth plane when rendering to a 3D image.
• MVKImage avoid swizzling storage and/or attachment image views.
• MVKImage avoid texel buffer for atomics if view format list
  exists and does not include either R32_UINT or R32_SINT format.
• MVKImageView always ignore transfer usages.
• MVKBufferView avoid triggering bytesPerRow validation warning.
• MVKDescriptorSetLayout speed up lookup of descriptor index and streamline binding access.
• MVKCmdBlitImage use layered draws when possible.
• MVKCmdBlitImage add 0.5 to layer index before interpolating.
• MVKCmdBlitImage support depth/stencil blits with inversion and scaling.
• MVKSwapchain allow images whose size doesn't match the CAMetalLayer.
• MVKPixelFormats add 0.5 ULP to clear values for normalized formats.
• MVKCommandEncoder don't set renderTargetArrayLength for mixed 2D/3D renders.
• MVKExtensions add missing tvOS case for unsupported extensions.
• MVKDescriptorSetLayout sort and hold bindings by binding number.
• MVKDescriptor simplify subclass implementations.
• MVKComputePipeline override max threads per threadgroup.
• MVKGPUCapture make sure the MTLCaptureScope has only one reference.
• MoltenShaderConverter fix tvOS build to support tvOS 9.0.
• Support building external libraries and dylibs against sanitizers.
• Clarify documentation on mapping limitations for host-coherent image memory on macOS.
• Add validation policy for MoltenVK development to README.md document.
• Update Xcode build settings check to Xcode 12.2.
• Update VK_MVK_MOLTENVK_SPEC_VERSION to 29.
• Update dependency libraries to match Vulkan SDK 1.2.162.
• Update to latest SPIRV-Cross version:
  • MSL: Support SPV_EXT_demote_to_helper_invocation for MSL 2.3.
  • MSL: Support run-time sized image and sampler arrays
    (GL_EXT_nonuniform_qualifier/SPV_EXT_descriptor_indexing).
  • MSL: Support atomic access to images from argument buffers.
  • MSL: Add missing interlock handling to atomic image buffers.
  • MSL: Fix calculation of atomic image buffer address.
  • MSL: Support querying and modifying generated combined sampler suffix.
  • MSL: Don't use a bitcast for tessellation levels in tesc shaders.
  • MSL: Handle Offset and Grad operands for 1D-as-2D textures.
  • MSL: Don't remove periods from swizzle buffer index exprs.
  • MSL: Correct definitions of subgroup ballot mask variables.
  • MSL: Extract global variables from subgroup ballot operations.
  • MSL: Mask ballots passed to ballot bit ops.
  • MSL: Don't mask off inactive bits in ballot masks.
  • MSL: Support vectors with OpGroupNonUniformAllEqual.
  • MSL: Cast broadcast booleans to ushort.
  • MSL: Do not use component::x gather for depth2d textures.
  • MSL: For 2.1+, don't disable rasterization for vertex writes.
  • MSL: Allow post-depth coverage on Mac in MSL 2.3.
  • MSL: Allow framebuffer fetch on Mac in MSL 2.3.
  • MSL: Allow Bias and Grad arguments with comparison on Mac in MSL 2.3.
  • MSL: Support pull-model interpolation on MSL 2.3+
  • MSL: Expand subgroup support.
  • MSL: Adjust FragCoord for sample-rate shading.
  • MSL: Expose some more features on iOS: min_lod_clamp(), simd_is_helper_thread(),
    barycentric_coord, and primitive_id.
  • MSL: Don't add fixup hooks for builtin variables if they're unused.
  • MSL: Don't try to use [[thread_index_in_simdgroup]] in vertex shaders.
  • Handle case where block is loop header, continue AND break block.
  • MSL: Added fmin3 and fmax3 library functions to the illegal name list.
  • Added Metal keyword: level.
  • Parser: Don't assume OpTypePointer will always take a SPIRType.
  • Add MIT dual license for the SPIRV-Cross API and CLI.