Update github-actions (#1574)

* Update tests.yml

* Update tests.yml

* Update tests.yml

Author: mmorel-35

.github/workflows/tests.yml

@@ -13,10 +13,11 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
+        cache: 'npm'
         node-version: ${{ matrix.node-version }}
     # Use separate run commands so command status handled correctly on Windows
     - name: npm install