message: Make Alloc::get_storage_version/get_content_version public
diff: @@ -272,21 +272,25 @@ protected:
  return m_storage_versioning_counter.load(std::memory_order_acquire);
  }
  +public:
  inline uint_fast64_t get_storage_version()
  {
  return m_storage_versioning_counter.load(std::memory_order_acquire);
  }
  +protected:
  inline void bump_storage_version() noexcept
  {
  m_storage_versioning_counter.fetch_add(1, std::memory_order_acq_rel);
  }
  +public:
  REALM_WORKAROUND_MSVC_BUG inline uint_fast64_t get_content_version() noexcept
  {
  return m_content_versioning_counter.load(std::memory_order_acquire);
  }
  +protected:
  inline uint_fast64_t bump_content_version() noexcept
  {
  return m_content_versioning_counter.fetch_add(1, std::memory_order_acq_rel) + 1;
  