ci: start testing against 22 (#447)

Adds Node 22 to the node_versions matrix

Author: wolfy1339

.github/workflows/test.yml

@@ -20,6 +20,7 @@ jobs:
         node_version:
           - 18
           - 20
+          - 22
     steps:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
       - name: Test with Node.js ${{ matrix.node_version }}