Allow either submit or submit_and_watch on the builder. (#9)

* Refactor: allow submit and submit_and_watch, separate module builders

* Convert Balances, and use generic ModuleCalls

* Convert System, and use generic ModuleCalls

* Extract common calls to set_call

* rustfmt

* Test contract put_code with valid contract

* Patch jsonrpc client dependency for bugfix

* Handle result from call builder inside submit

* Use patched version of jsonrpc

* Lift module calls to Error

* jsonrpc 13.0

* Remove unused static constraints

src/metadata.rs

@@ -19,7 +19,7 @@ use std::{
 };
 use substrate_primitives::storage::StorageKey;
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub enum MetadataError {
     ModuleNotFound(&'static str),
     CallNotFound(&'static str),