hyper-native-tls: unecessary flag?

[D4nte]

Hi,

Because an old version of hyper-native-tls is used, it means that through transient dependencies openssl 0.9.24 is used which is an older version not compatible with the actual openssl lib 1.1.1

I noticed the feature flag hyper-native-tls which I'd like to deactivate to solve my transient dependency issue: default-features = false

However, the crate cannot compile without this feature flag.
So my question is: What is the point of feature flag hyper-native-tls if there is no alternative to it?

error[E0412]: cannot find type `NativeTlsClient` in this scope
   --> /home/bobtimus/.cargo/registry/src/github.com-1ecc6299db9ec823/tweetust-0.10.0/src/conn/mod.rs:115:81
    |
115 | pub type DefaultHttpsConnector = hyper::client::Pool<hyper::net::HttpsConnector<NativeTlsClient>>;
    |                                                                                 ^^^^^^^^^^^^^^^ not found in this scope