Isolate failing test

Author: noteflakes

.github/workflows/test.yml

@@ -32,4 +32,5 @@ jobs:
     - name: Compile C-extension
       run: bundle exec rake compile
     - name: Run tests
-      run:  bundle exec rake test
+      # run:  bundle exec rake test
+      run: bundle exec ruby test/test_um.rb --name test_accept_each

CHANGELOG.md

@@ -1,3 +1,5 @@
+- Add `#spin`
+- Fix bugs in multishot read and other ops
 - Add `#recv`, `#send`
 - Add `#socket`, `#connect`