Oxigraph server: use OxHTTP server

lib/src/sparql/http/simple.rs

@@ -10,9 +10,11 @@ pub struct Client {
 impl Client {
     pub fn new(timeout: Option<Duration>) -> Self {
         let mut client = oxhttp::Client::new();
+        if let Some(timeout) = timeout {
             client.set_global_timeout(timeout);
+        }
         client
-            .set_user_agent(concat!("Oxigraph/", env!("CARGO_PKG_VERSION")).into())
+            .set_user_agent(concat!("Oxigraph/", env!("CARGO_PKG_VERSION")))
             .unwrap();
         Self { client }
     }

server/Cargo.toml

@@ -12,10 +12,8 @@ SPARQL server based on Oxigraph
 edition = "2018"
 
 [dependencies]
-async-std = { version = "1", features = ["attributes"] }
+oxhttp = { git = "https://github.com/oxigraph/oxhttp", branch = "master" }
-async-h1 = "2"
 clap = "2"
-http-types = "2"
 oxigraph = { version = "0.3.0-dev", path = "../lib", features = ["http_client"] }
 rand = "0.8"
 url = "2"