Update SystemEvent with DispatchInfo (#45)

src/events.rs

@@ -123,6 +123,7 @@ impl<T: System + Balances + 'static> TryFrom<Metadata> for EventsDecoder<T> {
 
         // Ignore these unregistered types, which are not fixed size primitives
         decoder.check_missing_type_sizes(vec![
+            "DispatchInfo",
             "DispatchError",
             "Result<(), DispatchError>",
             "OpaqueTimeSlot",

src/frame/system.rs

@@ -173,7 +173,7 @@ pub fn set_code(code: Vec<u8>) -> Call<SetCode> {
 #[derive(Clone, Debug, parity_scale_codec::Decode)]
 pub enum SystemEvent {
     /// An extrinsic completed successfully.
-    ExtrinsicSuccess,
+    ExtrinsicSuccess(runtime_support::weights::DispatchInfo),
     /// An extrinsic failed.
     ExtrinsicFailed(runtime_primitives::DispatchError),
 }