dropped support for Node v18

in the process, adjusted CI's Node support matrix

Author: moonglum

.github/workflows/tests.yaml

@@ -1,19 +1,18 @@
-name: tests
 on:
 - push
+
 jobs:
-    build:
+    test:
         runs-on: ubuntu-latest
         strategy:
             matrix:
                 node-version:
-                - 18.x
                 - 20.x
-                - 22.x
-                - 23.x
+                - 24.x
+                - latest
         steps:
-        - uses: actions/checkout@v4
-        - uses: actions/setup-node@v4
+        - uses: actions/checkout@v5
+        - uses: actions/setup-node@v6
           with:
               node-version: ${{ matrix.node-version }}
         - run: npm install-test

package.json

@@ -25,7 +25,7 @@
 		"lint": "eslint --cache ./lib ./bin/* ./test ./test/bin/* && echo ✓"
 	},
 	"engines": {
-		"node": ">= 18"
+		"node": ">= 20"
 	},
 	"dependencies": {
 		"browserslist": "~4.24.4",