test(overmind): fix test

Author: christianalfoni

packages/node_modules/overmind/src/ssr.test.ts

@@ -4,6 +4,7 @@ import {
   IOnInitialize,
   IConfig,
   rehydrate,
+  json,
 } from './'
 import { IMutation } from 'proxy-state-tree'
 
@@ -78,7 +79,7 @@ describe('Mock', () => {
 
     const overmind = new Overmind(config)
 
-    expect(overmind.state).toEqual({
+    expect(json(overmind.state)).toEqual({
       foo: 'bar2',
     })
   })