add rand_core dep in feat js (#58)

sube/Cargo.toml

@@ -53,7 +53,7 @@ rand_core = "0.6.3"
 
 [features]
 default = ["v14"]
-test = ["std", "wss", "ws", "http", "json", "v14", "dep:async-std"]
+test = ["std", "wss", "ws", "http", "json", "v14", "dep:async-std", "dep:rand_core"]
 http = ["dep:jsonrpc", "surf/h1-client-rustls"]
 http-web = ["dep:jsonrpc", "dep:wasm-bindgen", "surf/wasm-client"]
 json = ["scales/json"]
@@ -63,7 +63,7 @@ v14 = ["dep:scale-info", "frame-metadata/current"]
 ws = ["dep:async-mutex", "dep:async-std", "dep:ewebsock", "dep:futures-channel", "dep:futures-util", "dep:jsonrpc", "async-std/unstable"]
 wss = ["dep:async-tls", "ws", "ewebsock/tls", "async-std/unstable"]
 examples = ["dep:rand_core"]
-js = ["http-web", "json", "v14", 'async-std/unstable', "ws"]
+js = ["http-web", "json", "v14", 'async-std/unstable', "ws", "dep:rand_core"]
 
 [package.metadata.docs.rs]
 features = ["http"]