Update jsonrpc dependencies and rewrite dapps to futures. (#6522)

* Bump version.

* Fix RPC crate.

* Fix BoxFuture in crates.

* Compiles and passes tests!

* Get rid of .boxed()

* Fixing issues with the UI.

* Remove minihttp. Support threads.

* Reimplement files serving to do it in chunks.

* Increase chunk size.

* Remove some unecessary copying.

* Fix tests.

* Fix stratum warning and ipfs todo.

* Switch to proper branch of jsonrpc.

* Update Cargo.lock.

* Update docs.

* Include dapps-glue in workspace.

* fixed merge artifacts

* Fix test compilation.

dapps/src/tests/helpers/fetch.rs

@@ -94,7 +94,7 @@ impl FakeFetch {
 }
 
 impl Fetch for FakeFetch {
-	type Result = futures::BoxFuture<fetch::Response, fetch::Error>;
+	type Result = Box<Future<Item = fetch::Response, Error = fetch::Error> + Send>;
 
 	fn new() -> Result<Self, fetch::Error> where Self: Sized {
 		Ok(FakeFetch::default())
@@ -117,6 +117,17 @@ impl Fetch for FakeFetch {
 			tx.send(fetch::Response::from_reader(cursor)).unwrap();
 		});
 
-		rx.map_err(|_| fetch::Error::Aborted).boxed()
+		Box::new(rx.map_err(|_| fetch::Error::Aborted))
+	}
+
+	fn process_and_forget<F, I, E>(&self, f: F) where
+		F: Future<Item=I, Error=E> + Send + 'static,
+		I: Send + 'static,
+		E: Send + 'static,
+	{
+		// Spawn the task in a separate thread.
+		thread::spawn(|| {
+			let _ = f.wait();
+		});
 	}
 }