replace GetContents() by GetBackingStore()

Ref: nodejs/node#30339

Author: gabylb

src/utils.cpp

@@ -484,7 +484,11 @@ jvalueType javaGetArrayComponentType(JNIEnv *env, jobjectArray array) {
 #if (NODE_VERSION_AT_LEAST(4, 0, 0))
 v8::Local<v8::ArrayBuffer> newArrayBuffer(void* elems, size_t length) {
   v8::Local<v8::ArrayBuffer> ab = v8::ArrayBuffer::New(v8::Isolate::GetCurrent(), length);
+#if (V8_MAJOR_VERSION >= 8)
+  memcpy(ab->GetBackingStore()->Data(), elems, length);
+#else
   memcpy(ab->GetContents().Data(), elems, length);
+#endif
   return ab;
 }
 #endif