chore: explicitly configure Rustls default provider (#110)

By explicitly setting up Rustls crypto provider, we can now update
`reqwest` without breaking the integration tests, since
it will pick up as default provider.

### References
-
https://github.com/seanmonstar/reqwest/pull/2299/files#diff-0df5342f97493f9f55d6f43a14268f327ea9e791c7fdb8df6d88ec81f6baa721R570-R572

linkup-cli/Cargo.toml

@@ -20,7 +20,7 @@ log = "0.4.22"
 nix = { version = "0.29.0", features = ["signal"] }
 rand = "0.8.5"
 regex = "1.11.0"
-reqwest = { version = "0.12.4", default-features = false, features = [
+reqwest = { version = "0.12.8", default-features = false, features = [
     "blocking",
     "rustls-tls",
 ] }

local-server/Cargo.toml

@@ -15,7 +15,7 @@ hyper-rustls = "0.27.3"
 hyper-util = { version = "0.1.9", features = ["client-legacy"] }
 futures = "0.3.31"
 linkup = { path = "../linkup" }
-rustls = "0.23.15"
+rustls = { version = "0.23.15", default-features = false, features = ["ring"] }
 rustls-native-certs = "0.8.0"
 thiserror = "1.0.64"
 tokio = { version = "1.40.0", features = ["macros", "signal"] }

local-server/src/lib.rs

@@ -321,6 +321,8 @@ async fn shutdown_signal() {
 }
 
 fn https_client() -> HttpsClient {
+    let _ = rustls::crypto::ring::default_provider().install_default();
+
     let mut roots = rustls::RootCertStore::empty();
     for cert in rustls_native_certs::load_native_certs().expect("could not load platform certs") {
         roots.add(cert).unwrap();

server-tests/Cargo.toml

@@ -7,7 +7,7 @@ edition = "2021"
 linkup = { path = "../linkup" }
 linkup-local-server = { path = "../local-server" }
 http = "1.1.0"
-reqwest = { version = "0.12.4", default-features = false, features = [
+reqwest = { version = "0.12.8", default-features = false, features = [
     "blocking",
     "rustls-tls",
 ] }