Update jsonrpc requirement from 8 to 9

Cargo.toml

@@ -1,12 +1,8 @@
 [package]
 name = "jsonrpc_client"
-version = "0.2.0"
+version = "0.3.0"
 authors = [
-    "Thomas Eizinger <thomas@coblox.tech>",
-    "Philipp Hoenisch <philipp@coblox.tech>",
-    "Franck Royer <franck@coblox.tech>",
-    "Lloyd Fournier <lloyd@coblox.tech>",
-    "Lucas Soriano del Pino <lucas.soriano@coblox.tech>",
+    "CoBloX Team <team@coblox.tech>"
 ]
 description = "Client library for talking to JsonRPC APIs."
 license = "MIT OR Apache-2.0"
@@ -23,6 +19,5 @@ log = "0.4"
 
 [dev-dependencies]
 spectral = "0.6"
-jsonrpc-http-server = "8"
-jsonrpc-core = "8"
+jsonrpc-http-server = "9"
 env_logger = "0.5"

tests/jsonrpc_calls.rs

@@ -1,12 +1,11 @@
 extern crate env_logger;
 extern crate jsonrpc_client;
-extern crate jsonrpc_core;
 extern crate jsonrpc_http_server;
 extern crate spectral;
 
 use jsonrpc_client::*;
-use jsonrpc_core::*;
 use jsonrpc_http_server::*;
+use jsonrpc_http_server::jsonrpc_core::*;
 use spectral::prelude::*;
 
 fn main() {}
@@ -16,7 +15,7 @@ fn main() {}
 fn get_server_response() {
     let _ = env_logger::try_init();
 
-    let mut io = IoHandler::new();
+    let mut io = IoHandler::default();
     io.add_method("helloworld", |_: Params| {
         Ok(Value::String("hello".to_string()))
     });