Cargo Features

smol-jsonrpc has no features set by default.

[dependencies]
smol-jsonrpc = { version = "0.2.0", features = ["std"] }
std

Enables std of serde and serde_json

serde:

Provide impls for common standard library types like Vec<T> and HashMap<K, V>.
Requires a dependency on the Rust standard library.

smol-jsonrpc has 1 feature without comment.