fix: replace `is-utf8` with `utf-8-validate`

package is maintained by the already used package `ws`

`is-utf8` is abandoned and has some issues:
https://github.com/wayfind/is-utf8/issues/6

package.json

@@ -51,7 +51,6 @@
         "https-proxy-agent": "5.0.1",
         "i18next": "21.10.0",
         "iconv-lite": "0.6.3",
-        "is-utf8": "0.2.1",
         "js-yaml": "4.1.0",
         "json-stringify-safe": "5.0.1",
         "jsonata": "2.0.5",
@@ -78,6 +77,7 @@
         "tar": "7.2.0",
         "tough-cookie": "4.1.4",
         "uglify-js": "3.17.4",
+        "utf-8-validate": "5.0.10",
         "uuid": "9.0.1",
         "ws": "7.5.10",
         "xml2js": "0.6.2"

packages/node_modules/@node-red/nodes/core/function/90-exec.js

@@ -19,7 +19,7 @@ module.exports = function(RED) {
     var spawn = require('child_process').spawn;
     var exec = require('child_process').exec;
     var fs = require('fs');
-    var isUtf8 = require('is-utf8');
+    var isUtf8 = require('utf-8-validate');
     const isWindows = process.platform === 'win32'
 
     function ExecNode(n) {

packages/node_modules/@node-red/nodes/core/network/10-mqtt.js

@@ -18,7 +18,7 @@ module.exports = function(RED) {
     "use strict";
     const { getProxyForUrl } = require('./lib/proxyHelper');
     var mqtt = require("mqtt");
-    var isUtf8 = require('is-utf8');
+    var isUtf8 = require('utf-8-validate');
     var HttpsProxyAgent = require('https-proxy-agent');
     var url = require('url');
     const knownMediaTypes = {

packages/node_modules/@node-red/nodes/core/network/21-httpin.js

@@ -24,7 +24,7 @@ module.exports = function(RED) {
     var onHeaders = require('on-headers');
     var typer = require('content-type');
     var mediaTyper = require('media-typer');
-    var isUtf8 = require('is-utf8');
+    var isUtf8 = require('utf-8-validate');
     var hashSum = require("hash-sum");
 
     function rawBodyParser(req, res, next) {

packages/node_modules/@node-red/nodes/package.json

@@ -32,7 +32,7 @@
         "hash-sum": "2.0.0",
         "hpagent": "1.2.0",
         "https-proxy-agent": "5.0.1",
-        "is-utf8": "0.2.1",
+        "utf-8-validate": "5.0.10",
         "js-yaml": "4.1.0",
         "media-typer": "1.1.0",
         "mqtt": "5.7.0",