GitHub Actions caching tweak

.github/workflows/ci.yml

@@ -16,16 +16,18 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Setup Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: '14'
 
       - name: Cache node modules
-        uses: actions/cache@v1
+        uses: actions/cache@v2
+        env:
+          cache-name: cache-node-modules
         with:
           path: ~/.npm
-          key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
-          restore-keys: ${{ runner.os }}-node-
+          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: ${{ runner.os }}-build-${{ env.cache-name }}-
 
       - run: npm ci
       - run: npm test