use fs.promises instead of fs/promises

lib/datastore.js

@@ -425,9 +425,7 @@ class Datastore extends EventEmitter {
   }
 
   countAsync (query) {
-    const cursor = new Cursor(this, query, async docs => docs.length, true)
-
-    return cursor // this is a trick, Cursor itself is a thenable, which allows to await it
+    return new Cursor(this, query, async docs => docs.length, true) // this is a trick, Cursor itself is a thenable, which allows to await it
   }
 
   /**

lib/storage.js

@@ -7,7 +7,7 @@
  * It's essentially fs, mkdirp and crash safe write and read functions
  */
 const fs = require('fs')
-const fsPromises = require('fs/promises')
+const fsPromises = fs.promises
 const path = require('path')
 const { callbackify, promisify } = require('util')
 const storage = {}