Allow `string` as value in `relations`-slot of class `Thing` #486

	name: Model checks

	on:
	push:
	branches:
	- main
	pull_request:

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.11'

	- name: Install dependencies
	run: \|
	pip install -r requirements.txt

	- name: Patch linkml
	run: \|
	tools/patch_linkml

	- name: Run checks
	run: \|
	# make the checks self-contained re what is in the repo now
	make imports-local
	make check-models

Provide feedback