Node v4 requires "use strict" to allow block scoped let & const

Node v4: replaced "spread" operator with "apply"

Author: ekulabuhov

.travis.yml

@@ -13,7 +13,7 @@ matrix:
       node_js: '7'
       env: WEBPACK_VERSION="2.2.0" JOB_PART=test
     - os: linux
-      node_js: '4.3'
+      node_js: '4'
       env: WEBPACK_VERSION="2.2.0" JOB_PART=test
     - os: linux
       node_js: '6'

test/basicTest.js

@@ -1,3 +1,6 @@
+// Node v4 requires "use strict" to allow block scoped let & const
+"use strict";
+
 describe("basic tests", function() {
   var path = require("path");
 

test/utils.js

@@ -1,3 +1,6 @@
+// Node v4 requires "use strict" to allow block scoped let & const
+"use strict";
+
 var MemoryFS = require("memory-fs");
 var realFs = require("fs");
 var webpack = require("webpack");
@@ -39,9 +42,9 @@ module.exports = {
       compiler.inputFileSystem[fn] = function(_path) {
         // Fallback to real FS if file is not in the memoryFS
         if (fs.existsSync(_path)) {
-          return fs["mem" + fn](...arguments);
+          return fs["mem" + fn].apply(fs, arguments);
         } else {
-          return realFs[fn](...arguments);
+          return realFs[fn].apply(realFs, arguments);
         }
       };
     });