Update node version in actions to v20.11 (LTS) and use `.node-version…

…` file

.github/workflows/nodejs.yml

@@ -8,13 +8,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - name: Use Node.js
-      uses: actions/setup-node@v1
-      with:
-        node-version: '14.x'
-    - run: npm install
-    - run: npm run build
-    - run: npm test
-      env:
-        CI: true
+      - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.node-version'
+      - run: npm install
+      - run: npm run build
+      - run: npm test
+        env:
+          CI: true

.github/workflows/publish.yml

@@ -8,10 +8,10 @@ jobs:
   publish-npm:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 14
+          node-version-file: '.node-version'
           registry-url: https://registry.npmjs.org/
           cache: npm
       - run: npm ci

.node-version

@@ -0,0 +1 @@
+20.11.0