chore: update node on GitHub actions

No change to logic. This adds Node v24 to GitHub Actions CI. This drops
official support for Node v18 because it was marked end-of-life in March
2025.

Author: nfischer

.github/workflows/main.yml

@@ -10,9 +10,9 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
-          - 18
           - 20
           - 22
+          - 24
         os:
           - ubuntu-latest
           - macos-latest

README.md

@@ -9,7 +9,7 @@
 commands, providing an easy solution for simple Unix-like, cross-platform
 commands in npm package scripts.
 
-`shx` is proudly tested on every LTS node release since <!-- start minVersion -->`v18`<!-- stop minVersion -->!
+`shx` is proudly tested on every LTS node release since <!-- start minVersion -->`v20`<!-- stop minVersion -->!
 
 ## Difference Between ShellJS and shx
 

package.json

@@ -60,6 +60,6 @@
     "shelljs": "^0.10.0"
   },
   "engines": {
-    "node": ">=18"
+    "node": ">=20"
   }
 }

scripts/check-node-support.js

@@ -8,8 +8,8 @@ var yaml = require('js-yaml');
 var shell = require('shelljs');
 
 // This is the authoritative list of supported node versions.
-var MIN_NODE_VERSION = 18;
-var MAX_NODE_VERSION = 22;
+var MIN_NODE_VERSION = 20;
+var MAX_NODE_VERSION = 24;
 
 function checkReadme(minNodeVersion) {
   var start = '<!-- start minVersion -->';