Fix tests

tests/test_async.cpp

@@ -113,10 +113,9 @@ TEST_CASE("multi threads", "[async]") {
     size_t n_threads = 10;
     {
         auto [logger, async_sink] = creat_async_logger(queue_size, test_sink);
-
         std::vector<std::thread> threads;
         for (size_t i = 0; i < n_threads; i++) {
-            threads.emplace_back([logger, messages] {
+            threads.emplace_back([&] {
                 for (size_t j = 0; j < messages; j++) {
                     logger->info("Hello message #{}", j);
                 }