Run CI on latest OS versions (#288).

.github/workflows/main.yml

@@ -15,8 +15,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['pypy3', '3.6', '3.7', '3.8', '3.9', '3.10']
-        os: [macos-10.15, ubuntu-18.04, ubuntu-20.04, windows-2019]
+        os: [macos-latest, ubuntu-latest, windows-latest]
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10', 'pypy-3.9']
 
     steps:
     - name: Checkout code
@@ -30,31 +30,24 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install --upgrade coveralls setuptools tox wheel
+        python -m pip install --upgrade build coveralls setuptools tox wheel
 
-    - name: Build wheel
-      run: python setup.py bdist_wheel
+    - name: Build Vulture wheel
+      run: python -m build
 
-    - name: Install Vulture from wheel (for Linux and MacOS)
-      if: ${{ matrix.os != 'windows-2019' }}
-      run: "python -m pip install --only-binary=:all: ./dist/vulture-*.whl"
-
-    - name: Install Vulture from wheel (for Windows)
-      if: ${{ matrix.os == 'windows-2019' }}
+    - name: Install Vulture wheel
       run: "python -m pip install --only-binary=:all: --ignore-installed --find-links=dist/ vulture"
 
     - name: Run Vulture
       run: |
         vulture vulture/ tests/
         python -m vulture vulture/ tests/
 
-    # Tox fails to find PyPy on Windows. Neither "tox -e py" nor "tox -e pypy3" works.
     - name: Run tests
-      if: ${{ matrix.python-version != 'pypy3' || matrix.os != 'windows-2019' }}
       run: python -m tox -e py
 
-    - name: Check for style issues
-      if: ${{ matrix.python-version == 3.6 && matrix.os == 'ubuntu-20.04' }}
+    - name: Check style
+      if: ${{ matrix.python-version == 3.10 && startsWith(matrix.os, 'ubuntu') }}
       run: python -m tox -e style
 
     - name: Report coverage to Codecov