fix tests

tests/lib/utils/fileIo.spec.js

@@ -1,6 +1,11 @@
-import { expect } from 'chai'
+import chai from 'chai'
 import fIo from '@/lib/utils/fileIo'
 import sinon from 'sinon'
+import chaiAsPromised from 'chai-as-promised'
+
+chai.use(chaiAsPromised)
+const expect = chai.expect
+chai.should()
 
 describe('fileIo.js', () => {
   afterEach(() => {