fix node supported to 20 only

Author: nleush

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: ['18.x', '20.x']
+        node-version: ['20.x']
 
     steps:
       - uses: actions/checkout@v4
@@ -21,4 +21,4 @@ jobs:
       - name: Install dependencies
         run: npm i
       - name: Running tests
-        run: npm test
+        run: npm test

package.json

@@ -67,6 +67,6 @@
         "custom_plugins": "NODE_ENV=test_with_custom_plugins PORT=8080 mocha --exit test/custom_plugins.js"
     },
     "engines": {
-        "node": ">=18.0"
+        "node": ">=20.18"
     }
 }