Add empty "plugins" dir when packaging

gulpfile.js

@@ -190,6 +190,7 @@ gulp.task('zip', () => {
             '!composer.*',
             '!yarn.lock',
             '!plugins/**',
+            'plugins/',
             '!phpunit.xml',
             '!package.json',
             '!{tests,tests/**}',

index.php

@@ -22,7 +22,7 @@ require __DIR__.'/bootstrap/autoload.php';
 // Check the runtime environment
 runtime_check(array(
     'extensions' => array('pdo_mysql', 'openssl', 'gd', 'mbstring', 'tokenizer'),
-    'write_permission' => array('storage', 'resources', 'plugins')
+    'write_permission' => array('storage', 'plugins')
 ));
 
 // Process the request