add Node v22 to the CI - it's been that long

Author: Glynn Bird

.github/workflows/ci.yaml

@@ -22,7 +22,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x, 20.x]
+        node-version: [18.x, 20.x, 22.x]
 
     steps:
       - uses: actions/checkout@v3