Node 15 CI Failures

[rwjblue]

TypeError [ERR_INVALID_ARG_TYPE]: The "options" argument must be of type object. Received an instance of Array
    at ChildProcess.target.send (node:internal/child_process:716:7)
    at Array.forEach (<anonymous>)
    at dispatchQueuedRequests (/home/runner/work/ember-codemods-telemetry-helpers/ember-codemods-telemetry-helpers/test/fixtures/classic-app/node_modules/workerpool/lib/WorkerHandler.js:174:21)
    at ChildProcess.<anonymous> (/home/runner/work/ember-codemods-telemetry-helpers/ember-codemods-telemetry-helpers/test/fixtures/classic-app/node_modules/workerpool/lib/WorkerHandler.js:129:7)
    at ChildProcess.emit (node:events:369:20)
    at emit (node:internal/child_process:920:12)
    at processTicksAndRejections (node:internal/process/task_queues:82:21) {
  code: 'ERR_INVALID_ARG_TYPE'

This is probably fixed by a yarn.lock re-roll, but we'll need to double check.