fix: CI use yarn instead of npm

Author: oliveriosousa

.github/workflows/ci.yml

@@ -10,17 +10,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
 
-    strategy:
-      matrix:
-        node-version: [16.x]
-
     steps:
       - uses: actions/checkout@v2
-      - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v2
+      - uses: actions/setup-node@v2
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: "16"
+          cache: "yarn"
       - name: Install dependencies
-        run: npm install
+        run: yarn install
       - name: Run test:examples
-        run: npm run test:examples
+        run: yarn run test:examples