Fix support for SSL_CERT_FILE env var

By using rustls-native-certs in reqwest.

Closes #227.

Author: gaborcsardi

Cargo.lock

@@ -37,7 +37,7 @@ nix = { version = "0.28.0", features = ["fs", "user"] }
 path-clean = "1.0.1"
 rand = "0.8.5"
 regex = "1.5.4"
-reqwest = { version = "0.11", features = ["json", "stream", "rustls-tls", "hyper-rustls"], default-features = false }
+reqwest = { version = "0.11", features = ["json", "stream", "rustls-tls", "hyper-rustls", "rustls-tls-native-roots"], default-features = false }
 semver = "1.0.4"
 serde = { version = "1.0", features = ["derive"] }
 serde_derive = "1.0"