Method constexpr

Libs/sol/sol.hpp:14836–14839

				}
#if SOL_LUA_VESION_I_ >= 502
				else if constexpr (std::is_void_v<std::remove_pointer_t<T>>) {
					push(L, std::forward<Value>(value));
					lua_rawsetp(L, tableindex, std::forward<Key>(key));
				}
#endif // Lua 5.2.x
				else {
					push(L, std::forward<Key>(key));