Simplify workflow to run on single Node.js version

Author: stefanrammo

.github/workflows/test.yml

@@ -10,35 +10,26 @@ jobs:
   test:
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        node-version: [14, 16, 18]
-
     steps:
       - uses: actions/checkout@v3
 
-      - name: Set up Node.js ${{ matrix.node-version }}
+      - name: Set up Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: '18'
           cache: 'npm'
 
       - name: Install dependencies
         run: npm ci
 
-      - name: Create test directories
-        run: |
-          mkdir -p coverage
-          mkdir -p test-results
-
       - name: Run tests
         run: npm test
 
       - name: Upload test results
         if: always()
         uses: actions/upload-artifact@v3
         with:
-          name: test-results-${{ matrix.node-version }}
+          name: test-results
           path: |
             coverage/
             test-results/