Updated the files.

my-app/node_modules/fs-extra/lib/util/buffer.js

@@ -0,0 +1,12 @@
+'use strict'
+/* eslint-disable node/no-deprecated-api */
+module.exports = function (size) {
+  if (typeof Buffer.allocUnsafe === 'function') {
+    try {
+      return Buffer.allocUnsafe(size)
+    } catch (e) {
+      return new Buffer(size)
+    }
+  }
+  return new Buffer(size)
+}