v4.0.0

CHANGELOG

1. IMPORTANT: Rename YOPT_S_DEFERRED_EVENT to YOPT_S_NO_DISPATCH, and the default event dispatch behavior was changed,
   by default, the network thread will always dispatch events at end of event loop. you must set YOPT_S_NO_DISPATCH to 1 to
   ensure the dispatch behavior match with previous releases
2. The YOPT_S_DEFER_EVENT_CB return check changed, return true to tell io_service the event already processed, io_service will
   skip processed event, previous releases should return false
3. Improve kcp transport, fix data retention problem(caused by interval too large) and update kcp to git 1.7-f2aa30e
4. Add support forward packet on both send and recv stages
5. Rename preprocessors YASIO_HAVE_ to YASIO_ENABLE_XXX, YASIO_HAVE_CARES to YASIO_USE_CARES
6. Refactor non-blocking io mode, add epoll/wepoll, kqueue, evport support by YASIO_ENABLE_HPERF_IO, by default not enabled
7. Remove namespace yasio::gc
8. Improve object_pool and singleton
9. Migrate build scripts to powershell runs on windows,linux,macos
10. Rename cmake feature options:
    • YASIO_BUILD_WITH_LUA --> YASIO_ENABLE_LUA
    • YASIO_BUILD_WITH_CCLUA --> YASIO_ENABLE_CCLUA
    • YAISO_BUILD_NI --> YASIO_ENABLE_NI
11. Auto disable YASIO_BUILD_TESTS and YASIO_BUILD_LUA_EXAMPLE when yasio not in root directory of cmake project
12. Move public headers to yasio/ which are allow include directly, like yasio/xxx.hpp, private header to yasio/impl/ which don't allow been included

What's Changed

• Complete YOPT_C_UNPACK_NO_BSWAP for yasio_set_option() by @Y-way in #399
• Bump thirdparty from 408fe14 to 1f49f40 by @dependabot in #401
• Merge 4.x in to dev by @halx99 in #402
• Improve ci ndk setup by @halx99 in #404
• Add solaris-ci by @halx99 in #405
• Improve object_pool.hpp code style by @halx99 in #409
• Bump thirdparty from ea30362 to f87ebde by @dependabot in #410
• powershell for all by @halx99 in #415
• Improve source structure and io multiplexing by @halx99 in #418
• Bump thirdparty from b99edc8 to 1ee8315 by @dependabot in #420

Full Changelog: v3.39.7...v4.0.0