deps: silence irrelevant V8 warning

PR-URL: https://github.com/nodejs/node/pull/44741
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

common.gypi

@@ -36,7 +36,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.4',
+    'v8_embedder_string': '-node.5',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/include/v8-persistent-handle.h

@@ -252,7 +252,7 @@ class NonCopyablePersistentTraits {
  * This will clone the contents of storage cell, but not any of the flags, etc.
  */
 template <class T>
-struct V8_DEPRECATED("Use v8::Global instead") CopyablePersistentTraits {
+struct CopyablePersistentTraits {
   using CopyablePersistent = Persistent<T, CopyablePersistentTraits<T>>;
   static const bool kResetInDestructor = true;
   template <class S, class M>