add tests for minimal node version (currently v20.9.0) (#3556)

Beside testing against node version `v20.x` and `v22.x` we should also
test against the minimal node version, currently `v20.9.0`.

This is for seeing changes in dependencies which needs higher node
version as with the July-24-release, where we wrote `node >=20` but
shipped an `eslint` version which required `node>=20.9.0`.

.github/workflows/automated-tests.yaml

@@ -18,7 +18,7 @@ jobs:
     timeout-minutes: 30
     strategy:
       matrix:
-        node-version: [20.x, 22.x]
+        node-version: [20.9.0, 20.x, 22.x]
     steps:
       - name: "Checkout code"
         uses: actions/checkout@v4

.github/workflows/electron-rebuild.yaml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [20.x, 22.x]
+        node-version: [20.9.0, 20.x, 22.x]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4