message: chore: fix deprecated warning by using Nan:Call
diff: @@ -292,8 +292,9 @@ namespace NodeLibcurl {
  }
  v8::Local<v8::Value> argv[] = { err, easyArg, errCode };
  + const int argc = 3;
  - this->cbOnMessage->Call( this->handle(), 3, argv );
  + Nan::Call( *(this->cbOnMessage), obj->handle(), argc, argv );
  }
  // Add Curl constructor to the module exports
  @@ -435,8 +436,7 @@ namespace NodeLibcurl {
  }
  else {
  - v8::Local<v8::Function> callback = arg.As<v8::Function>();
  - obj->cbOnMessage.reset( new Nan::Callback( callback ) );
  + obj->cbOnMessage.reset( new Nan::Callback( arg.As<v8::Function>() ) );
  }
  info.GetReturnValue().Set( info.This() );
  