Update node versions in testing matrix

Author: shadowspawn

.github/workflows/tests.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [22.x, 24.x, latest]
+        node-version: [20.x, 22.x, 24.x, latest]
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps: