Fix tests

Author: TrySound

index.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const path = require('path');
 const WebWorkerTemplatePlugin = require('webpack/lib/webworker/WebWorkerTemplatePlugin');
 const SingleEntryPlugin = require('webpack/lib/SingleEntryPlugin');

package.json

@@ -23,7 +23,8 @@
       ],
       "no-underscore-dangle": 0,
       "no-param-reassign": 0,
-      "prefer-destructuring": 0
+      "prefer-destructuring": 0,
+      "strict": 0
     }
   },
   "peerDependencies": {

test/index.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const assert = require('assert');
 const fs = require('fs');
 const del = require('del');