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.

price-info/src/lib.rs

@@ -92,7 +92,7 @@ impl<F: Fetch> Client<F> {
 
 	/// Gets the current ETH price and calls `set_price` with the result.
 	pub fn get<G: Fn(PriceInfo) + Sync + Send + 'static>(&self, set_price: G) {
-		self.fetch.forget(self.fetch.fetch(&self.api_endpoint)
+		self.fetch.process_and_forget(self.fetch.fetch(&self.api_endpoint)
 			.map_err(|err| Error::Fetch(err))
 			.and_then(move |mut response| {
 				if !response.is_success() {
@@ -156,10 +156,11 @@ mod test {
 		}
 
 		// this guarantees that the calls to price_info::Client::get will block for execution
-		fn forget<F, I, E>(&self, f: F) where
+		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 {
+			E: Send + 'static,
+		{
 			let _ = f.wait();
 		}
 	}