Cargo Features

serial_int has no features set by default.

[dependencies]
serial_int = { version = "2.0.1", features = ["serde_impl"] }
serde_impl = 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_impl?