Workflow: Node.js 12 => 16

Author: Smoren

.github/workflows/test_master.yml

@@ -25,7 +25,7 @@ jobs:
           tools: composer:v2
 
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
 
@@ -65,7 +65,7 @@ jobs:
           tools: composer:v2
 
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0