Upgrade Node.js version to 20 in lint and tests workflows

Author: MarkusBordihn

.github/workflows/lint.yml

@@ -17,9 +17,9 @@ jobs:
       uses: actions/checkout@v2
 
     - name: Setup Node.js
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
-        node-version: 18
+        node-version: 20
 
     - name: Install linters
       run: npm install --no-package-lock eslint eslint-config-prettier eslint-plugin-compat eslint-plugin-jsdoc eslint-plugin-prettier @typescript-eslint/eslint-plugin @typescript-eslint/parser

.github/workflows/tests.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v2
         with:
-          node-version: '16'
+          node-version: '20'
 
       - name: Install dependencies
         run: npm ci