Feature: Support upcoming PHP 8 release.
(#246 by @clue)

Feature: Change default socket backlog size to 511.
(#242 by @clue)

Fix: Fix closing connection when cancelling during TLS handshake.
(#241 by @clue)

Fix: Fix blocking during possible accept() race condition
when multiple socket servers listen on same socket address.
(#244 by @clue)

Improve test suite, update PHPUnit config and add full core team to the license.
(#243 by @SimonFrings and #245 by @WyriHaximus)