fix: remove optional chainning for compatible with Nodejs12 and below (#2470)

Author: bugb

lib/api/readable.js

@@ -180,7 +180,7 @@ module.exports = class BodyReadable extends Readable {
       this
         .on('close', function () {
           signalListenerCleanup()
-          if (signal?.aborted) {
+          if (signal && signal.aborted) {
             reject(signal.reason || Object.assign(new Error('The operation was aborted'), { name: 'AbortError' }))
           } else {
             resolve(null)