fix: correct PYTHONPATH for CI compatibility

.gitea/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
           pip install -e ".[test]"
 
       - name: Run tests
-        run: PYTHONPATH=/app/src:$PYTHONPATH pytest tests/unit/ tests/integration/ -v --tb=short
+        run: PYTHONPATH=src:$PYTHONPATH pytest tests/unit/ tests/integration/ -v --tb=short
 
   lint:
     runs-on: ubuntu-latest
@@ -48,7 +48,7 @@ jobs:
           python-version: '3.11'
 
       - name: Install type checker
-        run: pip install mypy>=1.0.0 types-toml
+        run: pip install mypy>=1.0.0
 
       - name: Run mypy type checker
         run: mypy src/depcheck/ --ignore-missing-imports