v3.2.2

This release is a patch update. It adds a new feature but because that feature is gated behind a macro definition, the minor nor major versions are changed. New code should be unaffected!

• New feature: function pointer retrieval! It is not on by default!
  • Please note this is unsafe, see the documentation for SOL_GET_FUNCTION_POINTERS_UNSAFE - https://sol2.readthedocs.io/en/latest/safety.html
• A UBSan error for null pointer arithmetic was fixed up, resulting in UB-free codegen (It hadn't become a problem yet, but it was probably going to! #1017)
• load_result and friends are not copyable. They were never supposed to be, and since I only ever used them transiently it almost never came up until now (#995)
• An API for accessing and messing with the garbage collector has been added (#997)
• MoonJIT is totally supported. The author was very nice to us! (#967)
• Recently, documentation was improved around certain configuration macros (https://sol2.readthedocs.io/en/latest/safety.html):
  • SOL_CONTAINERS_START
  • SOL_NO_THREAD_LOCAL
  • SOL_ID_SIZE
• Configuration has been reworked through the library:
  • The user-facing definitions are, however, the same, and cleaned up a little bit.
  • You can place a folder and a in some directly that follows the convention <sol/config.hpp> and put your macro definitions in there to make it easier to manage your library-specific defines. This makes it easier to keep all your definitions together.
• Build issues on all systems from Mac OSX with Apple Clang to Windows with VC++ should be resolved now! (#1021 #1031 #1034)
• Issues with certain constant definitions in the Lua 5.4 release should not happen.
• Fixed some bugs in the use of is_lvalue_reference (thanks, #1028 !)