Cargo Features

unshield has no features set by default.

[dependencies]
unshield = { version = "0.2.0", features = ["async"] }
async = futures-lite

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-lite async?

Enables futures-lite ^0.1