Cargo Features

ClamClient has no features set by default.

[dependencies]
clam-client = { version = "0.1.1", features = ["serde-rs"] }
serde-rs = serde

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.

serde serde-rs?