Rust

Update to wgpu 0.20 (#4560) #60

Job	Run time
Format + check + test	5m 32s
Check wasm32 + wasm-bindgen	2m 31s
cargo-deny aarch64-apple-darwin	38s
android	25s
cargo-deny aarch64-linux-android	37s
Check Windows	1m 54s
cargo-deny i686-pc-windows-gnu	39s
cargo-deny i686-pc-windows-msvc	40s
cargo-deny i686-unknown-linux-gnu	39s
cargo-deny wasm32-unknown-unknown	39s
cargo-deny x86_64-apple-darwin	43s
cargo-deny x86_64-pc-windows-gnu	40s
cargo-deny x86_64-pc-windows-msvc	40s
cargo-deny x86_64-unknown-linux-gnu	38s
cargo-deny x86_64-unknown-linux-musl	43s
cargo-deny x86_64-unknown-redox	38s
	18m 16s

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