Upgrade GHA (#33)

Author: ssbarnea

.github/workflows/tox.yml

@@ -91,12 +91,12 @@ jobs:
 
       - name: Upload coverage data
         if: ${{ startsWith(matrix.passed_name, 'py') }}
-        uses: codecov/codecov-action@v3
+        uses: codecov/codecov-action@v4
         with:
           name: ${{ matrix.passed_name }}
-          fail_ci_if_error: false # see https://github.com/codecov/codecov-action/issues/598
           token: ${{ secrets.CODECOV_TOKEN }}
           verbose: true # optional (default = false)
+          fail_ci_if_error: true
 
       - name: Archive logs
         uses: actions/upload-artifact@v4
@@ -125,6 +125,17 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
+      - name: Merge logs into a single archive
+        uses: actions/upload-artifact/merge@v4
+        with:
+          name: logs.zip
+          pattern: logs*.zip
+          delete-merged: true
+
+      - name: Check codecov.io status
+        if: github.event_name == 'pull_request'
+        uses: coactions/codecov-status@main
+
       - name: Decide whether the needed jobs succeeded or failed
         uses: re-actors/alls-green@release/v1
         with: