Fix schema flattener to support list-type `type` field introduced in OpenAPI 3.1 #321

	name: flask-rebar Pull Request Tests

	on:
	- pull_request

	jobs:
	tests:
	name: Testing on Python ${{ matrix.python }}
	runs-on: ubuntu-latest
	strategy:
	max-parallel: 20
	fail-fast: false
	matrix:
	python:
	- 3.8
	- 3.9
	- "3.10"
	- 3.11
	marshmallow:
	- marshmallow==3.17.*
	- marshmallow==3.18.*
	- marshmallow>3.18.0
	flask:
	- flask=='2.2.' werkzeug=='2.2.'
	- flask=='2.3.' werkzeug=='2.3.'
	- flask=='3.0.' werkzeug=='3.0.'

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python:${{ matrix.python }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python }}
	- name: "Test with ${{matrix.libraries}}"
	run: \|
	python -m pip install -U pip
	python -m pip install '.[dev,enum]' ${{matrix.flask}} ${{matrix.marshmallow}}
	python -m pip freeze
	- name: Run Tests
	run: \|
	python -m pytest -v -ra --junitxml=pytest.xml
	- name: Publish Test Report
	uses: mikepenz/action-junit-report@v3
	if: always()
	with:
	report_paths: pytest.xml
	check_name: "JUnit Report python${{matrix.python}} ${{matrix.marshmallow}} ${{matrix.flask}}"

	formatter:
	name: Format using Black
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python 3.11
	uses: actions/setup-python@v4
	with:
	python-version: 3.11
	- name: "Install dependencies"
	run: \|
	python -m pip install -U pip
	python -m pip install '.[dev]'
	python -m pip freeze
	- name: Run black
	run: \|
	python -m black --check --diff .
	- name: Run flake8
	run: \|
	python -m flake8 .

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