workflows: build with Python build package

It's the build tool currently recommended by PyPA.  Since it builds in
a venv, we can stop installing some dependencies.

Signed-off-by: Benjamin Gilbert <bgilbert@cs.cmu.edu>

.github/workflows/python.yml

@@ -41,7 +41,7 @@ jobs:
     - name: Install Python tools
       run: |
         python -m pip install --upgrade pip
-        pip install jinja2 pytest setuptools
+        pip install build jinja2 pytest
     - name: Install OpenSlide
       run: |
         case "${{ matrix.os }}" in
@@ -52,8 +52,10 @@ jobs:
           brew install openslide
           ;;
         esac
+    - name: Build wheel
+      run: python -m build -w
     - name: Install
-      run: pip install .
+      run: pip install dist/*.whl
     - name: Run tests
       run: pytest -v
     - name: Tile slide
@@ -80,7 +82,7 @@ jobs:
     - name: Install Python tools
       run: |
         python -m pip install --upgrade pip
-        pip install flask Pillow pytest setuptools wheel
+        pip install build flask pytest
     - name: Install OpenSlide
       run: |
         mkdir -p c:\\openslide
@@ -91,13 +93,13 @@ jobs:
         echo "OPENSLIDE_PATH=c:\\openslide\\${zipname}\\bin" >> $GITHUB_ENV
     - name: Build wheel
       run: |
-        python setup.py bdist_wheel
+        python -m build -w
         basename=openslide-python-wheels-$GITHUB_RUN_NUMBER-$(echo $GITHUB_SHA | cut -c-10)
         mkdir -p "artifacts/${basename}"
         mv dist/*.whl "artifacts/${basename}"
         echo "basename=${basename}" >> $GITHUB_ENV
     - name: Install
-      run: pip install -e .
+      run: pip install artifacts/${basename}/*.whl
     - name: Run tests
       # Reads OPENSLIDE_PATH
       run: pytest -v