Mixed up increment operators implementation for cmrc::detail::directory::iterator

[harvestor]

Issue in "CMakeRC.cmake": prefix increment operator is written as postfix and vice versa. Should be:

        iterator operator++(int) noexcept {
            auto cp = *this;
            ++_base_iter;
            return cp;
        }

        iterator& operator++() noexcept {
            ++_base_iter;
            return *this;
        }