Rust

Remove RefCell #87

Job	Run time
Check wasm32 + wasm-bindgen	3m 44s
android	25s
cargo-deny aarch64-apple-darwin	56s
Format + check + test	4m 47s
Check Windows	2m 12s
cargo-deny aarch64-linux-android	40s
cargo-deny i686-pc-windows-gnu	40s
cargo-deny i686-pc-windows-msvc	41s
cargo-deny i686-unknown-linux-gnu	1m 6s
cargo-deny wasm32-unknown-unknown	41s
cargo-deny x86_64-apple-darwin	59s
cargo-deny x86_64-pc-windows-gnu	1m 5s
cargo-deny x86_64-pc-windows-msvc	51s
cargo-deny x86_64-unknown-linux-gnu	41s
cargo-deny x86_64-unknown-linux-musl	55s
cargo-deny x86_64-unknown-redox	42s
	21m 5s

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