Cargo Features

mark-flaky-tests has no features set by default.

[dependencies]
mark-flaky-tests = { version = "1.0.2", features = ["tokio"] }
tokio = futures

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

futures tokio?