Split linting into a separate GitHub Action workflow (#28)

.github/workflows/build.yml

@@ -13,9 +13,9 @@ jobs:
         python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies

.github/workflows/coverage.yml

@@ -7,16 +7,13 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: ['3.10']
 
     steps:
       - uses: actions/checkout@v1
-      - name: Set up Python ${{ matrix.python-version }}
+      - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: '3.10'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -27,6 +24,6 @@ jobs:
           coverage report -m
           coverage xml
       - name: Upload coverage to Codecov
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v3
         with:
           fail_ci_if_error: true

.github/workflows/lint.yml

@@ -0,0 +1,23 @@
+name: Lint
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+      - name: Run linting
+        run: |
+          make lint

tox.ini

@@ -13,5 +13,4 @@ python =
 passenv = TOXENV CI
 deps = -rrequirements.txt
 commands =
-    flake8 pangocairocffi tests --exclude pangocairocffi/_generated/ffi.py
     coverage run --source pangocairocffi -m pytest -s