Update GitHub Actions workflows to use Node.js 20.x and latest action versions

- Updated `npm-publish.yml` to use `actions/checkout@v4` and `actions/setup-node@v4`, changing the Node.js version to 20.x.
- Updated `pull-request.yml` to use `actions/checkout@v4` and `actions/setup-node@v4`, modifying the Node.js version matrix to include 18.x and 20.x.

Author: Olavo Parno

.github/workflows/npm-publish.yml

@@ -9,23 +9,23 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 20.x
       - run: npm install
       - run: npm run build
 
   publish-npm:
     needs: build
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 20.x
           registry-url: https://registry.npmjs.org/
       - run: npm install
       - run: npm publish
         env:
-          NODE_AUTH_TOKEN: ${{secrets.NPM_AUTH_TOKEN}}
+          NODE_AUTH_TOKEN: ${{secrets.NPM_AUTH_TOKEN}}

.github/workflows/pull-request.yml

@@ -13,15 +13,15 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [18.x, 20.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
           cache: "npm"
       - run: npm ci
-      - run: npm run build
+      - run: npm run build