ci: run tests with coverage and upload coverage artifact

Author: Wacken2012

.github/workflows/test.yml

@@ -25,5 +25,11 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
-      - name: Run tests
-        run: npm run test
+      - name: Run tests with coverage
+        run: npm run test -- --coverage
+
+      - name: Upload coverage report
+        uses: actions/upload-artifact@v3
+        with:
+          name: coverage-report
+          path: coverage