ci: update Node.js and Node-RED versions in CI matrix

Author: zachowj

.github/workflows/ci.yml

@@ -27,9 +27,11 @@ jobs:
         node-version:
           - 18
           - 20
+          - 22
         node-red-version:
           - "^3"
           - "3.1.1"
+          - "^4"
 
     name: Tests (Node ${{ matrix.node-version }} - node-red ${{ matrix.node-red-version }})
     steps: