CI: Update all GitHub Actions to the latest Node LTS version

.github/workflows/deploy.yml

@@ -12,10 +12,10 @@ jobs:
     name: Deploy to GitHub Pages
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16.x
+          node-version: 20.x
           cache: npm
 
       - name: Install dependencies

.github/workflows/format-check.yaml

@@ -18,12 +18,12 @@ jobs:
 
     steps:
       - name: Check out Git repo sitory
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
 
       - name: Install Node.js, NPM and Yarn
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v4
         with:
-          node-version: 14
+          node-version: 20
 
       - name: Install development dependencies
         run: npm install --also=dev

.github/workflows/static-analysis.yaml

@@ -18,12 +18,12 @@ jobs:
 
     steps:
       - name: Check out Git repo sitory
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
 
       - name: Install Node.js, NPM and Yarn
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v4
         with:
-          node-version: 14
+          node-version: 20
 
       - name: Install development dependencies
         run: npm install --also=dev

.github/workflows/test-deploy.yml

@@ -12,10 +12,10 @@ jobs:
     name: Test deployment
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16.x
+          node-version: 20.x
           cache: npm
 
       - name: Install dependencies