Add a dummy test to satisfy `nextest`. #158

Job	Run time
cargo check (msrv) (wasm32)	19s
cargo check (aarch64-android)	17s
cargo clippy (windows-latest)	1m 54s
cargo check (msrv) (windows-latest)	1m 9s
cargo clippy (macos-latest)	24s
cargo clippy (wasm32)	27s
cargo check (msrv) (macos-latest)	21s
cargo doc	25s
cargo clippy (ubuntu-latest)	42s
cargo check (msrv) (ubuntu-latest)	23s
formatting	24s
cargo test (windows-latest)	2m 14s
cargo test (wasm32)	20s
cargo test (macos-latest)	40s
typos	4s
cargo test (ubuntu-latest)	1m 28s
	11m 31s

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