ci: watcher for automerge

Author: Borda

Diff for: .github/workflows/build.yml

@@ -26,3 +26,17 @@ jobs:
        run: ./.github/scripts/build.sh
        env:
          PYTHON_VERSION: ${{ matrix.python-version }}
+
+  watcher:
+    runs-on: ubuntu-latest
+    needs: build
+    if: always()
+    steps:
+    - run: echo "${{ needs.build.result }}"
+    - name: failing...
+      if: needs.build.result == 'failure'
+      run: exit 1
+    - name: cancelled or skipped...
+      if: contains(fromJSON('["cancelled", "skipped"]'), needs.build.result)
+      timeout-minutes: 1
+      run: sleep 90