Add basic github build pipeline

.github/workflows/main.yml

@@ -0,0 +1,34 @@
+name: CI
+
+on:
+  push:
+    branches: [ master, ci, release ]
+  pull_request:
+    branches: [ master ]
+
+  workflow_dispatch:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.6, 3.7, 3.8, 3.9]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Setup Poetry
+      uses: Gr1N/setup-poetry@v4
+    - name: Install dependencies
+      run: poetry install
+    - name: Lint with flake8
+      run: |
+        poetry run pip install flake8
+        poetry run flake8 . --count --show-source --max-complexity=10 --max-line-length=80 --statistics
+    - name: Build package
+      run: poetry build