Fix ci

.github/workflows/ci.yml

@@ -32,11 +32,17 @@ jobs:
     steps:
     - name: Check out ${{ github.sha }} from repository ${{ github.repository }}
       uses: actions/checkout@v4
+    - name: Ignore certificate verification on Python 3.5
+      shell: bash
+      run: |
+        # INSECURE!! But it should be OK for CI tests.
+        echo 'PIP_TRUSTED_HOST=pypi.python.org pypi.org files.pythonhosted.org' >>$GITHUB_ENV
+      if: 'matrix.python-version == 3.5'
     - name: Setup PYTHONPATH (windows)
       if: contains(matrix.os, 'windows')
       run: echo "PYTHONPATH=${env:PYTHONPATH};${env:GITHUB_WORKSPACE};${env:GITHUB_WORKSPACE}\resources\lib;${env:GITHUB_WORKSPACE}\tests" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf-8 -Append
     - name: Set up Python ${{ matrix.python-version }}
-      uses: MatteoH2O1999/setup-python@v3
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies (linux)