Cargo Features

A2S has no features set by default.

[dependencies]
a2s = { version = "0.5.2", features = ["serialization", "async"] }
serialization = serde
async = tokio

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 serialization?
tokio async?