ci: implement linter in through github-actions

.flake8

@@ -1,2 +1,6 @@
 [flake8]
+extend-ignore = E501,E265,W605
 max-line-lenght = 100
+exclude = jlc_kicad_tools.egg-info/*
+show_source = True
+statistics = True

.github/workflows/checks.yml

@@ -0,0 +1,29 @@
+name: Tests and Checks
+
+on: [push, pull_request]
+
+jobs:
+  checks:
+    runs-on: "ubuntu-latest"
+    strategy:
+      matrix:
+        python-version: ['pypy-3.7']
+        os: ["ubuntu-latest"]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Setup python
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+          pip install -r test-requirements.txt
+
+      - name: Conforming code
+        run: |
+          flake8 --config .flake8 .

test-requirements.txt

@@ -0,0 +1 @@
+flake8==3.9.1