[meta] set engines to >= 4

Author: ljharb

.github/workflows/node-aught.yml

@@ -6,6 +6,6 @@ jobs:
   tests:
     uses: ljharb/actions/.github/workflows/node.yml@main
     with:
-      range: '< 10'
+      range: '>= 4 < 10'
       type: minors
       command: npm run tests-only

package.json

@@ -28,5 +28,8 @@
     "posttest": "npx npm@'>= 10.2' audit --production"
   },
   "author": "Dominic Tarr <[email protected]> (dominictarr.com)",
-  "license": "(MIT AND BSD-3-Clause)"
+  "license": "(MIT AND BSD-3-Clause)",
+  "engines": {
+    "node": ">= 4"
+  }
 }