build: add Node 10 and macOS, update JSHint and GitHub Actions, adopt QUnit

* Fix readme to correctly reflect what we actually test.

  We haven't tested on macOS in a long time, but we can restore that.
  We haven't tested on Node.js 0.8 in a long time. While our dev
  tooling doesn't run there, the oldest we can comfortably do is
  Node.js 10 so let's test on that and update our claim accordingly.

* Update JSHint and use directly from npm script, instead of via Grunt.

* Update GitHub Actions to v4 images to fix deprecation warnings.

* Switch from unmaintained nodeunit to latest QUnit,
  and simplify test logic to be less indirect to increase confidence.

* Remove lock file
  per https://timotijhof.net/posts/2024/lockfiles-for-apps-not-packages-still/

Author: Krinkle

.github/workflows/test.yml

@@ -6,30 +6,32 @@ env:
   FORCE_COLOR: 2
 
 jobs:
-  run:
-    name: Node ${{ matrix.node }} on ${{ matrix.os }}
-    runs-on: ${{ matrix.os }}
-
+  tests:
     strategy:
       fail-fast: false
       matrix:
-        node: [20]
-        os: [ubuntu-latest, windows-latest]
+        node: [10, 12, 20, 22]
+        # Node 10-20 are not available on ARM, use macos-15-intel instead
+        os: [ubuntu-latest, macos-15-intel, windows-latest]
+        include:
+          - os: macos-latest
+            node: 22
+
+    name: Node ${{ matrix.node }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
 
     steps:
       - name: Clone repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Node.js
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
 
-      - name: Install npm dependencies
-        run: npm i
+      - run: npm install
 
-      - name: Run tests
-        run: npm test
+      - run: npm test
 
       # We test multiple Windows shells because of prior stdout buffering issues
       # filed against Grunt. https://github.com/joyent/node/issues/3584

.gitignore

@@ -1 +1,2 @@
 node_modules
+package-lock.json

.jshintignore

@@ -0,0 +1 @@
+node_modules

.jshintrc

@@ -1,5 +1,6 @@
 {
   "curly": true,
+  "esversion": 6,
   "eqeqeq": true,
   "immed": true,
   "latedef": "nofunc",

Gruntfile.js

@@ -1,3 +1,5 @@
+[![Tested with QUnit](https://qunitjs.com/testedwith.svg)](https://qunitjs.com/)
+
 # exit-x
 
 Fork of unmaintained https://github.com/cowboy/node-exit
@@ -8,7 +10,7 @@ To make a long story short, if `process.exit` is called on Windows, script outpu
 
 See [Node.js issue #3584](https://github.com/joyent/node/issues/3584) for further reference.
 
-Tested in OS X 10.8, Windows 7 on Node.js 0.8.25 and 0.10.18.
+Tested with Node.js 10+ on Linux, macOS, and Windows.
 
 Based on some code by [@vladikoff](https://github.com/vladikoff).