Add & declare type-checking #32

	name: Check for version bump
	on:
	pull_request:
	types:
	- opened
	- synchronize
	- reopened
	- labeled
	- unlabeled
	jobs:
	check:
	if: ${{ !contains(github.event.pull_request.labels.*.name, 'skip-release') }}
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: "3.10"

	- name: Install Poetry
	uses: snok/install-poetry@v1

	- name: Install Curl
	run: sudo apt install curl

	- name: Get package version
	run: echo "PACKAGE_VERSION=$(poetry version \| awk '{print $2}')" >> $GITHUB_ENV

	- name: Check for existing PyPI version
	run: curl -I --silent --fail -o /dev/null https://pypi.org/project/zarr-checksum/$PACKAGE_VERSION/ && exit 1 \|\| exit 0

	- name: Error if version found
	if: ${{ failure() }}
	run: \|
	echo "Current package version ($PACKAGE_VERSION) already exists. Please either bump the \
	package version, or add the \"skip-release\" label to the pull request." \
	&& exit 1

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