v0.8.1

What's Changed

• Fix pooled stack allocator in-pool size calculation by @Coldwings in #542
• add fstack CI by @beef9999 in #549
• thread_yield() possible to return error_number obtained from thread_i… by @lihuiba in #560
• Fix/sockpool wait_for_fd 0.8 by @Coldwings in #557
• Fix the -Wshadow warning in compile by @beef9999 in #569
• Fix photon_std::thread::id default constructor by @beef9999 in #573
• FIX: stupid typo in kqueue cancel_wait by @Coldwings in #575
• Fix getpagesize() when first used by @beef9999 in #568

Full Changelog: v0.8.0...v0.8.1