Function to_lowercase

RedEdrShared/utils.cpp:78–82

std::wstring to_lowercase(const std::wstring& str) {
    std::wstring lower_str = str;
    std::transform(lower_str.begin(), lower_str.end(), lower_str.begin(), ::towlower);
    return lower_str;
}

std::string to_lowercase2(const std::string& str) {
    std::string lower_str = str;