CI: run tests on Node 22

Author: larabr

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false # if tests for one version fail, continue with the rest
       matrix:
-        node-version: [18.x, '20.x']
+        node-version: [18.x, '20.x', '22.x']
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     name: Node integration tests (${{ matrix.node-version }})