fix serialport build err under unix (#730)

Author: Sneezry

vendor/node-usb-native/src/serialport_poller.cpp

@@ -83,7 +83,11 @@ NAN_METHOD(SerialportPoller::New) {
   }
 
   SerialportPoller* obj = new SerialportPoller();
-  obj->fd_ = info[0]->ToInt32()->Int32Value();
+  #if NODE_MAJOR_VERSION >= 10
+    obj->fd_ = info[0]->ToInt32(v8::Isolate::GetCurrent())->Int32Value();
+  #else
+    obj->fd_ = info[0]->ToInt32()->Int32Value();
+  #endif
   obj->callback_ = new Nan::Callback(info[1].As<v8::Function>());
   // obj->callCallback();
 

vendor/node-usb-native/src/serialport_unix.cpp

@@ -41,8 +41,13 @@ OpenBatonPlatformOptions* ParsePlatformOptions(const v8::Local<v8::Object>& opti
   Nan::HandleScope scope;
 
   UnixPlatformOptions* result = new UnixPlatformOptions();
-  result->vmin = Nan::Get(options, Nan::New<v8::String>("vmin").ToLocalChecked()).ToLocalChecked()->ToInt32()->Int32Value();
-  result->vtime = Nan::Get(options, Nan::New<v8::String>("vtime").ToLocalChecked()).ToLocalChecked()->ToInt32()->Int32Value();
+  #if NODE_MAJOR_VERSION >= 10
+    result->vmin = Nan::Get(options, Nan::New<v8::String>("vmin").ToLocalChecked()).ToLocalChecked()->ToInt32(v8::Isolate::GetCurrent())->Int32Value();
+    result->vtime = Nan::Get(options, Nan::New<v8::String>("vtime").ToLocalChecked()).ToLocalChecked()->ToInt32(v8::Isolate::GetCurrent())->Int32Value();
+  #else
+    result->vmin = Nan::Get(options, Nan::New<v8::String>("vmin").ToLocalChecked()).ToLocalChecked()->ToInt32()->Int32Value();
+    result->vtime = Nan::Get(options, Nan::New<v8::String>("vtime").ToLocalChecked()).ToLocalChecked()->ToInt32()->Int32Value();
+  #endif
 
   return result;
 }