Fix `use strict`

* Fix `use strict` for `filesystem/index.js`

lib/providers/filesystem/index.js

@@ -2,10 +2,7 @@
 // Node module: loopback-component-storage
 // This file is licensed under the Artistic License 2.0.
 // License text available at https://opensource.org/licenses/Artistic-2.0
-
-// Turning on strict for this file breaks;
-// disabling strict for this file
-/* eslint-disable strict */
+'use strict';
 
 // Globalization
 var g = require('strong-globalize')();
@@ -176,7 +173,7 @@ FileSystemProvider.prototype.upload = function(options, cb) {
 
   var fileOpts = {flags: options.flags || 'w+',
     encoding: options.encoding || null,
-    mode: options.mode || 0666,
+    mode: options.mode || parseInt('0666', 8),
   };
 
   try {