Fix windows build

src/common.cpp

@@ -9,7 +9,7 @@
 namespace spdlog {
 
 spdlog::level level_from_str(const std::string &name) noexcept {
-    const auto *it = std::find(std::begin(level_string_views), std::end(level_string_views), name);
+    auto *it = std::find(std::begin(level_string_views), std::end(level_string_views), name);
     if (it != std::end(level_string_views)) return static_cast<level>(std::distance(std::begin(level_string_views), it));
 
     // check also for "warn" and "err" before giving up