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Document currency code capability, in README and example #388

	name: Lint and Test

	on:
	pull_request:

	jobs:
	lint:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.11'

	- name: Install Poetry
	run: \|
	python -m pip install --upgrade pip
	pip install poetry

	- name: Install dependencies (with dev)
	run: poetry install --with dev --no-interaction

	- name: Run lint
	run: make lint

	- name: Run tests
	run: make test