Update Node version

* From node 4.0 to node 22
* The version is updated for using the latest devDependneices only

Author: Mond WAN

.eslintrc.json

@@ -1,8 +1,5 @@
 language: node_js
 node_js:
-    - 17
-    - 16
-    - 15
     - lts/*
 
 script:

.travis.yml

@@ -5,7 +5,7 @@ module.exports = function (grunt) {
         eslint: {
             src: ['lib/*.js', 'lib/**/*.js'],
             options: {
-                overrideConfigFile: '.eslintrc.json',
+                overrideConfigFile: 'eslint.config.js',
             },
         },
         mochaTest: {

Gruntfile.js

@@ -2,7 +2,7 @@
 
 a ping wrapper for nodejs
 
-@last-modified: 2023-03-11
+@last-modified: 2025-09-29
 
 # License MIT
 
@@ -12,12 +12,16 @@ http://github.com/danielzzz/node-ping
 
 # Description
 
-node-ping is a simple wrapper for the system ping utility
+node-ping is a simple wrapper for the system ping utility.
 
 # Installation
 
 npm install ping
 
+Notes:
+
+* Although it is marked with node >=22, it should technially working in all node version for production purpose. The version is marked for development point of view
+
 # Usage
 
 Below are examples extracted from `examples`