`minitest-queue` `ENOENT` error if `log` folder does not exist

👋 Running into a ENOENT error when the gem tries to open up the log/test_order.log file and the log directory does not exist.

Running this command on CI:

bundle exec minitest-queue run --max-requeues 3 --requeue-tolerance 0.01 --timeout 45 -Itest:lib $(find test -name \*_test.rb | sort)

Causes this error:

/usr/local/bundle/gems/bundler-1.17.3/lib/bundler/rubygems_integration.rb:200: warning: constant Gem::ConfigMap is deprecated
--
  | Traceback (most recent call last):
  | 8: from /tmp/bundle/ruby/2.7.0/gems/minitest-5.14.1/lib/minitest.rb:68:in `block in autorun'
  | 7: from /tmp/bundle/ruby/2.7.0/gems/minitest-5.14.1/lib/minitest.rb:139:in `run'
  | 6: from /tmp/bundle/ruby/2.7.0/gems/minitest-5.14.1/lib/minitest.rb:849:in `start'
  | 5: from /tmp/bundle/ruby/2.7.0/gems/minitest-5.14.1/lib/minitest.rb:849:in `each'
  | 4: from /tmp/bundle/ruby/2.7.0/gems/minitest-reporters-1.4.2/lib/minitest/minitest_reporter_plugin.rb:16:in `start'
  | 3: from /tmp/bundle/ruby/2.7.0/gems/minitest-reporters-1.4.2/lib/minitest/minitest_reporter_plugin.rb:16:in `each'
  | 2: from /tmp/bundle/ruby/2.7.0/gems/ci-queue-0.20.5/lib/minitest/queue/order_reporter.rb:11:in `start'
  | 1: from /tmp/bundle/ruby/2.7.0/gems/ci-queue-0.20.5/lib/minitest/queue/order_reporter.rb:11:in `open'
  | /tmp/bundle/ruby/2.7.0/gems/ci-queue-0.20.5/lib/minitest/queue/order_reporter.rb:11:in `initialize': No such file or directory @ rb_sysopen - log/test_order.log (Errno::ENOENT)

Committing an empty log folder at the root of my repo fixes it. The folder should just be created on its own if it doesn't exist and is required at runtime.

Start at the minitest-queue run entry point and the failing ci-queue/minitest/queue/order_reporter.rb:11 path shown in the traceback. Reproduce the command without a log directory, then verify the run succeeds and creates the required log path automatically.