chore(cicd): Add multiple Airflow versions to testing pipeline

Author: tomasfarias

.github/workflows/test.yaml

@@ -14,6 +14,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: [3.7, 3.8, 3.9]
+        airflow-version: ['1.10.12', '2.0.2', '2.2.2']
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -25,8 +26,10 @@ jobs:
         uses: abatilo/actions-poetry@v2.1.4
         with:
           poetry-version: 1.1.12
+      - name: Install Airflow ${{ matrix.airflow-version }}
+        run: python -m pip install apache-airflow==${{ matrix.airflow-version }}
       - name: Install airflow-dbt-python with Poetry
-        run: poetry install -E amazon -E postgres -E airflow
+        run: poetry install -E amazon -E postgres
       - name: Style guide enforcement with flake8
         run: poetry run flake8 .
       - name: Static type checking with mypy