Remove Node 16 check

Author: paulbrimicombe

.github/workflows/pull-requests.yaml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x, 20.x, 22.x]
+        node-version: [18.x, 20.x, 22.x]
 
     steps:
     - uses: actions/checkout@v2