more node16 support by bumping actions used in validation workflow

.github/workflows/build-test.yml

@@ -12,12 +12,12 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
       with:
         submodules: true
-    - uses: actions/setup-node@v1
+    - uses: actions/setup-node@v3
       with:
-        node-version: '14.x'
+        node-version: '16.x'
       # How to consume GitHub packages, from this message (!): https://github.community/t/download-from-github-package-registry-without-authentication/14407/35
       # Inspired from here: https://github.com/jcansdale-test/npmrc-configurations/blob/master/.github/workflows/blank.yml
     - name: Authenticate to GitHub Packages
@@ -43,7 +43,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
     - name: checkout this action
-      uses: actions/checkout@v1
+      uses: actions/checkout@v3
       with:
         submodules: true