Cargo.toml: Use the tokio async test macro.

Cargo.toml

@@ -35,7 +35,6 @@ cjson = { version = "0.1.0", optional = true }
 tokio = { version = "0.2.13", default-features = false, features = ["sync"] }
 
 [dev-dependencies]
-tokio = { version = "0.2.13", features = ["full"] }
-async-std = { version = "1.5.0", features = ["unstable", "attributes"] }
+tokio = { version = "0.2.13", features = ["rt-threaded", "macros"] }
 url = "2.1.1"
 mockito = "0.23.3"

src/crypto/machine.rs

@@ -414,7 +414,7 @@ mod test {
         assert!(machine.should_upload_keys());
     }
 
-    #[async_std::test]
+    #[tokio::test]
     async fn receive_keys_upload_response() {
         let mut machine = OlmMachine::new(&user_id(), DEVICE_ID);
         let mut response = keys_upload_response();
@@ -443,7 +443,7 @@ mod test {
         assert!(!machine.should_upload_keys());
     }
 
-    #[async_std::test]
+    #[tokio::test]
     async fn generate_one_time_keys() {
         let mut machine = OlmMachine::new(&user_id(), DEVICE_ID);
 
@@ -516,7 +516,7 @@ mod test {
         assert!(ret.is_ok());
     }
 
-    #[async_std::test]
+    #[tokio::test]
     async fn test_keys_for_upload() {
         let mut machine = OlmMachine::new(&user_id(), DEVICE_ID);
         machine.uploaded_signed_key_count = Some(0);