ci: update node.js to cache dependencies

.github/dependabot.yml

@@ -1,15 +0,0 @@
-# For more information see: https://docs.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates
-
-version: 2
-updates:
-  - package-ecosystem: 'github-actions'
-    directory: '/'
-    schedule:
-      interval: 'monthly'
-
-  - package-ecosystem: 'npm'
-    versioning-strategy: 'auto'
-    directory: '/'
-    open-pull-requests-limit: 10
-    schedule:
-      interval: 'monthly'

.github/workflows/node.js.yml

@@ -20,5 +20,16 @@ jobs:
         uses: actions/setup-node@v2.1.2
         with:
           node-version: ${{ matrix.node-version }}
-      - run: npm ci
-      - run: npm run test
+
+      - name: 'Install dependencies'
+        run: npm ci
+
+      - name: 'Run the tests'
+        run: npm test
+
+      - name: 'Cache dependencies'
+        uses: actions/cache@v2
+        with:
+          path: |
+            **/node_modules
+          key: ${{ runner.os }}-${{ hashFiles('**/package-lock.json') }}