Relax ESLint header lint

Reviewed By: passy

Differential Revision: D17878532

fbshipit-source-id: 976626d3254a4e570633687424b37fe0d0589707

.eslintrc.js

@@ -8,7 +8,7 @@
 const fbjs = require('eslint-config-fbjs');
 
 // enforces copyright header and @format directive to be present in every file
-const pattern = /^\*\n \* Copyright 20\d{2}-present Facebook\.\n \* This source code is licensed under the MIT license found in the\n \* LICENSE file in the root directory of this source tree\.\n \* @format\n./;
+const pattern = /^\*\n[\S\s]*Facebook[\S\s]* \* @format\n/;
 
 const prettierConfig = {
   requirePragma: true,