test(overmind): fix typing

Author: christianalfoni

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

@@ -1,4 +1,4 @@
-import { createOvermindMock, IAction, TOnInitialize } from './'
+import { createOvermindMock, IAction, IOnInitialize } from './'
 
 type State = {
   foo: string
@@ -63,7 +63,7 @@ describe('Mock', () => {
 
     type Config = typeof config
 
-    interface OnInitialize extends TOnInitialize<Config> {}
+    interface OnInitialize extends IOnInitialize<Config> {}
 
     const overmind = createOvermindMock(config, {
       effect() {