fix imports

Author: kalebphipps

.github/workflows/test-pypi.yml

@@ -51,7 +51,7 @@ jobs:
     needs: build-and-publish
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         python-version: ["3.10", "3.11", "3.12"]
 
     runs-on: ${{ matrix.os }}
@@ -107,4 +107,4 @@ jobs:
     - name: Run tests with coverage
       run: |
         python --version
-        pytest --cov=paint
+        pytest --cov=paint --import-mode=importlib