v2.18.5

This release adds some work arounds for classes that are declared final and thusly can't use sol's callable traits due to that limitation. It also improves the error handling and report for users who get errors with userdata, reporting a mirror of the actual type's name.

This release also changes how expections are handled when we detect that it is possible to propagate errors through the Lua API boundary (e.g., when they're compiled as C++ or you're using LuaJIT compiled for a proper platform). In this case, we won't catch all exceptions: instead, they will be thrown without holding onto them.

Also fixes: pairs/ipairs iteration bug