ci: update Node.js versions in CI matrix and engine requirement

- Update CI matrix to test against Node.js 20, 22, and 24.
- Adjust `package.json` engine requirement to Node.js >=20.0.0.

Author: z0ffy

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: ['18', '20', '22']
+        node-version: ['20', '22', '24']
     steps:
       - name: Checkout code
         uses: actions/checkout@v4

package.json

@@ -79,7 +79,7 @@
     "vite": "^4.0.0 || ^5.0.0 || ^6.0.0 || ^7.0.0"
   },
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=20.0.0"
   },
   "lint-staged": {
     "*.ts": [