Add deprecated to Python 3.7 dependency installation step

Author: Ickerday

.github/workflows/test.yml

@@ -31,7 +31,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: (Python 3.7) Install dependencies
         if: ${{ matrix.python-version == '3.7' }}
-        run: python -m pip install python-dotenv pytest
+        run: python -m pip install deprecated python-dotenv pytest 
       - name: (Python >= 3.9) Install dependencies
         if: ${{ matrix.python-version != '3.7' }}
         run: python -m pip install . --group test