Update lots of CI steps

Author: pimterry

.github/workflows/ci.yml

@@ -10,17 +10,17 @@ jobs:
         node-version: [12.x, 14.x, 16.x]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v2
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
 
       - run: npm install --no-package-lock
       - run: npm test
       - run: npm run build-storybook --quiet
 
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v4
         # Only publish examples using the master branch, and only from one build
         if: github.ref == 'refs/heads/master' && matrix.node-version == '16.x'
         with:
@@ -35,9 +35,9 @@ jobs:
     needs: build
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
-      - uses: actions/download-artifact@v4.1.7
+      - uses: actions/download-artifact@v4
         with:
           name: examples
           path: examples