install requirements-test.txt at testing time

Author: cmacdonald

.github/workflows/push.yml

@@ -30,7 +30,7 @@ jobs:
  - name: Install Python dependencies
  run: |
  python -m pip install --upgrade pip
- pip install -r requirements.txt
+ pip install -r requirements.txt requirements-test.txt
  - name: install-windows
  if: matrix.os == 'windows-latest'
  run: |