add option to use different strategy , upgrade holmes #7868

	name: Test Poetry lock file
	on:
	- push
	- pull_request
	jobs:
	run_tests:
	name: Test lock file
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: 3.9
	- name: Run poetry lock
	run: \|
	curl -sSL https://install.python-poetry.org \| python3 -
	poetry lock --check

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