submitExtrinsic returns hash (#154)

packages/type-jsonrpc/src/author.ts

@@ -14,7 +14,7 @@ const submitExtrinsic: CreateItemOptions = {
   params: [
     param('extrinsic', 'Bytes')
   ],
-  type: 'Header'
+  type: 'Hash'
 };
 
 /**

packages/util/src/syncify.spec.js

@@ -4,7 +4,6 @@
 
 import syncify from './syncify';
 
-// FIXME fails locally now for some reason - not TS related. Since it is unused (for _right_ now), not an issue, but needs to be solved
 describe('syncify', () => {
   it('returns the result of the promise', () => {
     expect(