Cargo Features

tokio-tls-helper has no features set by default.

[dependencies]
tokio-tls-helper = { version = "0.3.0", features = ["tls-roots"] }
tls-roots = rustls-native-certs

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.

rustls-native-certs tls-roots?

Enables rustls-native-certs ^0.5