Run lint during CI

Author: akx

.github/workflows/main.yml

@@ -1,10 +1,28 @@
 name: test
 
-on: 
+on:
   - push
   - pull_request
 
 jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip setuptools wheel
+          python -m pip install -r requirements-dev.txt
+      - name: Run flake8
+        run: flake8
+      - uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip
   build:
     runs-on: ubuntu-latest
     strategy:
@@ -26,7 +44,7 @@ jobs:
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip
-  
+
   deploy:
     name: Build deploy
     runs-on: ubuntu-latest
@@ -39,4 +57,3 @@ jobs:
           build: true
           # only upload if a tag is pushed (otherwise just build & check)
           upload: ${{ github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags') }}
-