Rewrite capabilities method using passthrough

Author: mahsa shadi

src/adapters/vfs/system.js

@@ -57,10 +57,7 @@ const methods = (core, request) => {
       .then(({body}) => body);
 
   return {
-    capabilities: ({path}, options) => request('capabilities', {
-      path,
-      options
-    }, 'json').then(({body}) => body),
+    capabilities: passthrough('capabilities'),
 
     readdir: ({path}, options) => request('readdir', {
       path,

src/vfs.js

@@ -73,6 +73,7 @@ const handleDirectoryList = (path, options) => result =>
       showHiddenFiles: options.showHiddenFiles !== false,
       filter: options.filter
     }));
+
 /**
  * Get vfs capabilities
  *