Log Message:
devel/ruby-io-event: update to 1.1.6

1.1.5 (2023-01-05)

* Don't worry about race conditions when calling @output.close.
* Move all v2 implementation inside conditional.
* Add experimental support for io_select hook.
* Flush all pending events on every loop iteration.

1.1.6 (2023-01-10)

* Constants are used by v1 implementation too.
* Test nonblocking IO on non-windows platforms. (#52)