Clear link-call timeouts when node is closed

Fixes #3959

packages/node_modules/@node-red/nodes/core/common/60-link.js

@@ -248,6 +248,14 @@ module.exports = function(RED) {
             }
         });
 
+        this.on("close", function () {
+            for (const event of Object.values(messageEvents)) {
+                if (event.ts) {
+                    clearTimeout(event.ts)
+                }
+            }
+        })
+
         this.returnLinkMessage = function(eventId, msg) {
             if (Array.isArray(msg._linkSource) && msg._linkSource.length === 0) {
                 delete msg._linkSource;

packages/node_modules/node-red/lib/red.js

@@ -33,7 +33,7 @@ if (NODE_MAJOR_VERSION > 14) {
 
 function checkVersion(userSettings) {
     var semver = require('semver');
-    if (!semver.satisfies(process.version,">=14.0.0")) {
+    if (!semver.satisfies(process.version,">=12.0.0")) {
         // TODO: in the future, make this a hard error.
         // var e = new Error("Unsupported version of Node.js");
         // e.code = "unsupported_version";