node_modules: update (#352)

Co-authored-by: dawidd6 <9713907+dawidd6@users.noreply.github.com>

node_modules/nodemailer/dist/cjs/smtp-pool/index.js

@@ -100,6 +100,7 @@ class SMTPPool extends node_events_1.EventEmitter {
         this._queue = [];
         this._connections = [];
         this._connectionCounter = 0;
+        this._pending = 0;
         this.idling = true;
         setImmediate(() => {
             if (this.idling) {
@@ -132,10 +133,20 @@ class SMTPPool extends node_events_1.EventEmitter {
             setImmediate(() => callback(err));
             return false;
         }
+        // counted until the callback runs, whichever path runs it: delivered, failed, requeued
+        // until it gives up, or drained by close()
+        let counted = true;
+        this._pending++;
         this._queue.push({
             mail,
             requeueAttempts: 0,
-            callback
+            callback: (err, info) => {
+                if (counted) {
+                    counted = false;
+                    this._pending--;
+                }
+                callback(err, info);
+            }
         });
         if (this.idling && this._queue.length >= this.options.maxConnections) {
             this.idling = false;
@@ -479,6 +490,19 @@ class SMTPPool extends node_events_1.EventEmitter {
     isIdle() {
         return this.idling;
     }
+    /**
+     * Counts the messages the pool has not finished with yet: the ones waiting in the queue
+     * plus the ones a connection is transmitting right now. isIdle() only tells whether the
+     * pool can take another message, it is already true while a message is still being sent,
+     * so use this to check that nothing would be lost by closing the pool. A message that is
+     * re-queued after its connection dropped is counted until its callback runs, also while it waits to be put back on the queue, and
+     * it is no longer counted by the time its callback runs.
+     *
+     * @returns Number of queued and in-flight messages
+     */
+    pendingCount() {
+        return this._pending;
+    }
     verify(callback) {
         let promise;
         if (!callback) {