Fix some compilation errors upstream

patches/node/.patches

@@ -32,3 +32,5 @@ remove_deprecated_task_api_override_removed_in_latest_v8.patch
 remove_serialization_deserialization_of_wasmmoduleobject.patch
 64bit_bump_typedarray_max_length_to_2_32-1_elements.patch
 override_existing_v8_reallocate.patch
+fix_use_hex_not_decimal_for_clarity.patch
+fix_explicitly_override_mark_arraybuffer_as_untransferable.patch

patches/node/fix_explicitly_override_mark_arraybuffer_as_untransferable.patch

@@ -0,0 +1,21 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Shelley Vohr <shelley.vohr@gmail.com>
+Date: Wed, 12 Feb 2020 14:23:09 -0800
+Subject: fix: explicitly override mark_arraybuffer_as_untransferable
+
+We need to mark overridden functions explicitly. This has already been
+fixed upstream at https://github.com/nodejs/node/pull/30549.
+
+diff --git a/src/node_api.cc b/src/node_api.cc
+index 0f7981cd5605ae2dad029b6bfb6a032afc09dfe0..5e467dded5bdb75a1831492b6b45c0d5eacab7f2 100644
+--- a/src/node_api.cc
++++ b/src/node_api.cc
+@@ -26,7 +26,7 @@ struct node_napi_env__ : public napi_env__ {
+   }
+
+   v8::Maybe<bool> mark_arraybuffer_as_untransferable(
+-      v8::Local<v8::ArrayBuffer> ab) const {
++      v8::Local<v8::ArrayBuffer> ab) const override {
+     return ab->SetPrivate(
+         context(),
+         node_env()->arraybuffer_untransferable_private_symbol(),

patches/node/fix_use_hex_not_decimal_for_clarity.patch

@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Shelley Vohr <shelley.vohr@gmail.com>
+Date: Wed, 12 Feb 2020 14:19:11 -0800
+Subject: fix: use hex not decimal for clarity
+
+In Electron, clang enforces -Wxor-used-as-pow, so we should use hex
+here to clarify intent for the compiler.
+
+Upstreamed at https://github.com/nodejs/node/pull/31758.
+
+diff --git a/src/module_wrap.cc b/src/module_wrap.cc
+index b53aab6dc16c7ae42530998c94ddc845035b1256..c6aa5751a1bbaa693b915e418de8eb69ea8139f8 100644
+--- a/src/module_wrap.cc
++++ b/src/module_wrap.cc
+@@ -923,7 +923,7 @@ bool IsArrayIndex(Environment* env, Local<Value> p) {
+   if (!n->ToInteger(context).ToLocal(&cmp_integer)) {
+     return false;
+   }
+-  return n_dbl > 0 && n_dbl < (2 ^ 32) - 1;
++  return n_dbl > 0 && n_dbl < (1LL << 32) - 1;
+ }
+
+ Maybe<URL> ResolveExportsTarget(Environment* env,