v3.22.1f3

Fix rtfd.

v3.22.1f2

Delete unnecessary typedef of struct pollfd, WinSock2 already does.

Move portable string_view from namespace yasio to cxx17

v3.22.1f1

Updage page.

Add header only support for core implementation(c++)

Sync v3.22.1 finally finally (#116)

* Update README.md

* Optimize sources.

* Rename io_service's member transports_dypool_ to transports_pool_

* Tidy sources.

* Update description.

* Fix compile issues for HEADER ONLY support.

* Fix compile issues with YASIO_HAVE_KCP for HEADER ONLY support.

* Sync kcptest.cpp

* Remove unused definations

* Optimize includes for YASIO_HEADER_ONLY

Use inline namespace avoid conflicit on Apple platform.

v3.22.0

1. Add kcp support.
2. Change obstream.pop behavoir, see: https://github.com/halx99/yasio/wiki/obstream#Encapsulate-Packet
3. Remove unused send timeout.
4. Remove duplicated macro YOPT_CONNECT_TIMEOUT for script bindings.

Fix cocos script timer implementation, avoid timer target confilicit with normal object

v3.21.3f1

Optimize typo.

Add yasio_memcpy for YASIO_NI, because C# no such function yet.

v3.21.3

Preparing for v3.21.3 release.

DNT use, for researching ONLY

From issue: https://github.com/skywind3000/kcp/issues/138,

set interval to 16ms.

Fix tcp keepalive option behavior is incorrect

v3.21.2

Fix ci warnings.

v3.21.1

yasio-3.21.1

1. Fix connection handle_close detect problem.
2. Add YASIO_NI API: yasio_set_console_print_fn.