message: Add missing CAF_CORE_EXPORT
diff: #pragma once
  #include "caf/byte.hpp"
  +#include "caf/detail/core_export.hpp"
  #include "caf/detail/ieee_754.hpp"
  #include "caf/save_inspector_base.hpp"
  #include "caf/span.hpp"
  #include "caf/type_id.hpp"
  #include <array>
  +#include <cstdint>
  namespace caf::hash {
  /// US Secure Hash Algorithm 1 (SHA1) as defined in RFC 3174.
  -class sha1 : public save_inspector_base<sha1> {
  +class CAF_CORE_EXPORT sha1 : public save_inspector_base<sha1> {
  public:
  /// Hash size in bytes.
  static constexpr size_t hash_size = 20;
  