ci: add node 22 to the test matrix (#209)

Replaced node 21 with latest node 22. See
https://nodejs.org/en/about/previous-releases

Author: danielpza

.github/workflows/main.yml

@@ -21,7 +21,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        node-version: [18, 20, 21]
+        node-version: [18, 20, 22]
 
     steps:
       - uses: actions/checkout@v4