fix(JsonRpcError): data can be of any type (#36)

Author: S1lentium

src/errors.ts

@@ -10,7 +10,7 @@ export class JsonRpcError extends BaseError {
   constructor (
     message = 'unknown error from the peer',
     code = -32000,
-    data?: string
+    data?: any
   ) {
     super(message)
 

src/json-rpc.type.ts

@@ -56,7 +56,7 @@ export type PayloadType =
 // <-- {"jsonrpc": "2.0", "error": {"code": -32600, "message": "Invalid Request"}, "id": null}
 export interface JsonRpcErrorSchema {
   code: number
-  data?: string
+  data?: any
   message: string
 }