build: add native-tls integration

Author: davehorner

eventsource-client/Cargo.toml

@@ -13,6 +13,7 @@ exclude = ["CHANGELOG.md"]
 futures = "0.3.21"
 hyper = { version = "0.14.19", features = ["client", "http1", "tcp"] }
 hyper-rustls = { version = "0.24.1", optional = true }
+hyper-tls = { version = "0.5", optional = true }
 log = "0.4.6"
 pin-project = "1.0.10"
 tokio = { version = "1.17.0", features = ["time"] }
@@ -27,10 +28,10 @@ tokio = { version = "1.2.0", features = ["macros", "rt-multi-thread"] }
 test-case = "3.2.1"
 proptest = "1.0.0"
 
-
 [features]
 default = ["rustls"]
 rustls = ["hyper-rustls", "hyper-rustls/http2"]
+native-tls = ["hyper-tls"]
 
 [[example]]
 name = "tail"

eventsource-client/examples/tail.rs

@@ -26,8 +26,12 @@ async fn main() -> Result<(), es::Error> {
                 .backoff_factor(2)
                 .delay_max(Duration::from_secs(60))
                 .build(),
-        )
-        .build();
+        );
+    #[cfg(feature = "rustls")]
+    let client = client.build();
+
+    #[cfg(feature = "native-tls")]
+    let client = client.build_http(); 
 
     let mut stream = tail_events(client);