Added some missing headers.

source/mijin/util/align.hpp

@@ -4,6 +4,8 @@
 #if !defined(MIJIN_UTIL_ALIGN_HPP_INCLUDED)
 #define MIJIN_UTIL_ALIGN_HPP_INCLUDED 1
 
+#include <bit>
+#include <cstdint>
 #include "../internal/common.hpp"
 
 namespace mijin
@@ -27,4 +29,4 @@ T* alignUp(T* pointer, std::uintptr_t alignTo) MIJIN_NOEXCEPT
 #define MIJIN_STRIDEOF(T) mijin::alignUp(sizeof(T), alignof(T))
 } // namespace mijin
 
-#endif // !defined(MIJIN_UTIL_ALIGN_HPP_INCLUDED)
+#endif // !defined(MIJIN_UTIL_ALIGN_HPP_INCLUDED)