fix build

Author: aleks-pro

gulp/helpers/mocha-reporter-spec-with-retries.js

@@ -18,7 +18,7 @@ const {
     EVENT_TEST_RETRY,
 } = Mocha.Runner.constants;
 
-const { inherits } = Mocha.utils;
+const { inherits } = require('util');
 
 const Base  = Mocha.reporters.Base;
 const color = Base.color;