create action

.github/workflows/main.yml

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+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the action will run. 
+on:
+  # Triggers the workflow on push or pull request events but only for the main branch
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+
+jobs:
+  ci:
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [3.9]
+        poetry-version: [1.0, 1.1.2]
+        os: [ubuntu-18.04, macos-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Run image
+        uses: abatilo/actions-poetry@v2.0.0
+        with:
+          poetry-version: ${{ matrix.poetry-version }}
+      - name: View poetry --help
+        run: poetry --help