Improve the CI workflow YAML file

This makes it consistent with the GitHub Advanced Security file and,
more importantly, ensures that all steps have a proper name for better
visibility.

.github/workflows/ci.yml

@@ -1,14 +1,24 @@
 name: CI
 on: [push, pull_request]
 jobs:
-  build:
+  test:
+    name: Test
     runs-on: ubuntu-latest
+
     steps:
-      - uses: actions/checkout@v2
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
       - name: Use Node.js 14 LTS
         uses: actions/setup-node@v1
         with:
           node-version: 14.x
-      - run: npm install -g gulp-cli
+
-      - run: npm install
+      - name: Install Gulp
-      - run: npm test
+        run: npm install -g gulp-cli
+
+      - name: Install other dependencies
+        run: npm install
+
+      - name: Run tests
+        run: npm test