Hide the async pipeline from the public API (#706) #1676

Job	Run time
cargo check (aarch64-android)	24s
cargo clippy (wasm32)	1m 17s
cargo clippy (windows-latest)	2m 21s
cargo fmt	24s
cargo clippy (macos-latest)	1m 4s
Prime LFS Cache	9s
cargo clippy (ubuntu-latest)	1m 22s
cargo test (wasm32)	25s
cargo check (msrv) (windows-latest)	1m 32s
cargo check (msrv) (wasm32)	43s
cargo check (msrv) (macos-latest)	53s
cargo check (msrv) (ubuntu-latest)	43s
cargo doc	1m 6s
typos	4s
cargo test (windows-latest)	1m 49s
cargo test (macos-latest)	1m 25s
cargo test (ubuntu-latest)	3m 1s
	18m 42s

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