toml parser update + 'toml' module is built-in now

src/util/stringutil.hpp

@@ -57,6 +57,8 @@ namespace util {
     std::vector<std::wstring> split(const std::wstring& str, char delimiter);
 
     std::string format_data_size(size_t size);
+
+    std::pair<std::string, std::string> split_at(std::string_view view, char c);
 }
 
 #endif // UTIL_STRINGUTIL_HPP_