Merge pull request #60 from lambda-sh/vmarcella/add-wgpu #344

Job	Run time
Build lambda-rs on ubuntu-latest with features lambda-rs/with-vulkan.	3m 12s
Build lambda-rs on macos-latest with features lambda-rs/with-metal.	3m 1s
Build lambda-rs on windows-latest with features lambda-rs/with-dx12.	4m 38s
	10m 51s

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