update astropy_helpers

.github/workflows/python-package.yml

@@ -139,3 +139,35 @@ jobs:
         # If allowed failures are needed, uncomment continue-on-error.
         # continue-on-error: true
         run: flake8 speclite --count --max-line-length=100
+
+  #
+  # Temporary test to make sure the package can at least be installed
+  # for more recent Python versions.
+  #
+  install:
+    name: Installation test
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: true
+      matrix:
+        os: [ubuntu-latest]
+        python-version: ['3.10', '3.11', '3.12']
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install Python dependencies
+        run: |
+          python -m pip install --upgrade pip wheel setuptools
+          python -m pip install numpy\<2.0 scipy matplotlib astropy pyyaml
+
+      - name: Test installing from the checkout
+        run: python -m pip install .

.gitmodules

@@ -1,3 +1,3 @@
 [submodule "astropy_helpers"]
 	path = astropy_helpers
-	url = https://github.com/astropy/astropy-helpers.git
+	url = https://github.com/bsipocz/astropy-helpers.git