refactor: remove mock-fs from dev dependency

test/unit/util/assert.ts

@@ -1,5 +1,5 @@
 import * as chai from 'chai'
-import assert from '../../../src/util/assert'
+import assert from 'src/util/assert'
 
 const expect = chai.expect
 

test/unit/util/promise.ts

@@ -5,7 +5,7 @@ import * as sinonChai from 'sinon-chai'
 const expect = chai.expect
 chai.use(sinonChai)
 
-const P = require('../../../src/util/promise')
+const P = require('src/util/promise')
 
 describe('util/promise', function () {
   describe('.anySeries()', function () {

test/unit/util/strftime.ts

@@ -1,5 +1,5 @@
 import * as chai from 'chai'
-import t from '../../../src/util/strftime'
+import t from 'src/util/strftime'
 
 const expect = chai.expect
 

test/unit/util/underscore.ts

@@ -1,8 +1,8 @@
 import * as chai from 'chai'
 import * as sinonChai from 'sinon-chai'
 import * as sinon from 'sinon'
-import { RenderError, RenderBreakError } from '../../../src/util/error'
-import * as _ from '../../../src/util/underscore'
+import { RenderError, RenderBreakError } from 'src/util/error'
+import * as _ from 'src/util/underscore'
 
 const expect = chai.expect
 chai.use(sinonChai)