ci: do not use preview release for workflows

.cirrus.yml

@@ -17,7 +17,7 @@ test_task:
   pip_script:
     - $PYTHON -m ensurepip
     - $PYTHON -m pip install pip -U
-    - $PYTHON -m pip install poetry -U --pre
+    - $PYTHON -m pip install poetry -U
     - $PYTHON -m poetry config virtualenvs.in-project true
   deps_script: $PYTHON -m poetry install
   test_script: $PYTHON -m poetry run pytest -q --junitxml=junit.xml tests

.github/workflows/main.yml

@@ -42,7 +42,7 @@ jobs:
         shell: bash
         run: |
           curl -fsS -o get-poetry.py https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py
-          python get-poetry.py --preview -y
+          python get-poetry.py -y
           echo "::set-env name=PATH::$HOME/.poetry/bin:$PATH"
 
       - name: Configure poetry