Without the change build fails against `gcc-13` on `master` as
https://hydra.nixos.org/build/246569430:
In file included from /build/source/apps/m17-mod.cpp:3:
/build/source/include/m17cxx/Util.h:213:47: error: 'uint8_t' was not declared in this scope
213 | constexpr bool get_bit_index(const std::array<uint8_t, N>& input, size_t index)
| ^~~~~~~
/build/source/include/m17cxx/Util.h:12:1: note: 'uint8_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
11 | #include <limits>
+++ |+#include <cstdint>
12 |
d7b970c4ee