Switch from npm to pnpm for faster package installation (#1559)

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
         uses: actions/setup-node@v3
         with:
           node-version: "${{ env.NODE }}"
-          cache: npm
+          cache: pnpm
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
@@ -32,8 +32,8 @@ jobs:
       - run: ruby --version
       - run: node --version
 
-      - name: Install npm dependencies
-        run: npm install
+      - name: Install pnpm dependencies
+        run: pnpm install
 
       - name: Build
-        run: npm run build
+        run: pnpm run build