0.8.0: Runtime `buffer_device_address` choices

API changes

• Unmark fn mapped_ptr() as unsafe (#32)
• Make whether the device supports buffer_device_address or not a runtime setting in VulkanAllocatorCreateDesc (#34)

Debug improvements

• Implement Debug for VulkanAllocator (#36)
• Also log memory_heaps in VulkanAllocator::debug() (#37)

Visualizer

• imgui upgrade to 0.7 (#25)
• Show number of blocks at the top level (#33)

Examples

• winit upgrade to 0.25 (#26)
• Fix lifetime issues by not calling .build() on Vulkan builders (#27)

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And various smaller internal cleanups 🥳. Special thanks to @hrydgard for contributing most of the improvements above!