fix linting in lib/filter.js

etpinard · etpinard · commit c57a1e5ffb64 · 2016-09-26T18:29:36.000-04:00
diff --git a/lib/filter.js b/lib/filter.js
@@ -6,4 +6,6 @@
 * LICENSE file in the root directory of this source tree.
 */
 
+'use strict';
+
 module.exports = require('../src/transforms/filter');
