Does not build as shared library

[antores]

Describe the bug
Drogon does not build shared library because of using thread_local in lib/src/Utilities.cc.

To Reproduce
Build drogon with -DBUILD_SHARED_LIBS:BOOL=ON

Expected behavior
Successful build.

Desktop (please complete the following information):

• OS: Windows 11
• MSYS2 CLANG64

Additional context
Errors produced:

xxx/drogon/lib/src/Utilities.cc:1235:46: error: 'hash' cannot be thread local when declared 'dllexport'
 1235 |         thread_local trantor::utils::Hash256 hash;
      |                                              ^
xxx/drogon/lib/src/Utilities.cc:1236:29: error: 'i' cannot be thread local when declared 'dllexport'
 1236 |         thread_local size_t i = 0;