add missing include

include/spdlog/details/pattern_formatter_impl.h

@@ -8,6 +8,7 @@
 #include <spdlog/formatter.h>
 #include <spdlog/details/log_msg.h>
 #include <spdlog/details/os.h>
+#include <spdlog/details/format.h>
 
 #include <chrono>
 #include <ctime>

include/spdlog/sinks/file_sinks.h

@@ -8,7 +8,7 @@
 #include <spdlog/sinks/base_sink.h>
 #include <spdlog/details/null_mutex.h>
 #include <spdlog/details/file_helper.h>
-
+#include <spdlog/details/format.h>
 
 #include <algorithm>
 #include <chrono>