feat: use reqwest rustls-tls instead of openSSL (cloudevents#37)

for less build dependencies and a working CI

Signed-off-by: Fabrizio Lazzaretti <[email protected]>

Author: Lazzaretti

cloudevents-sdk-reqwest/Cargo.toml

@@ -8,7 +8,7 @@ edition = "2018"
 
 [dependencies]
 cloudevents-sdk = { path = ".." }
-reqwest = { version = "0.10" }
+reqwest = { version = "0.10", features = ["rustls-tls"] }
 lazy_static = "1.4.0"
 bytes = "^0.5"
 serde_json = "^1.0"