fix(period-week-number): calculation error for period week number #6

	name: CI
	permissions:
	contents: write
	on:
	pull_request:
	branches:
	- master

	jobs:
	build:

	# Machine environment:
	# https://help.github.com/en/articles/software-in-virtual-environments-for-github-actions#ubuntu-1804-lts
	# We specify the Node.js version manually below, and use versioned Chrome from Puppeteer.
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v1
	- name: Use Node.js 16.15.0
	uses: actions/setup-node@v1
	with:
	node-version: 16.15.0
	- name: Install dependencies
	run: npm install
	- name: Lint
	run: npm run lint
	- name: Build Demo
	run: npm run build:ci
	- name: Test
	run: npm run test:lib
	- name: Docs
	run: npm run docs:build
	- name: Copy Files
	run: npm run copy:demo:ci && npm run copy:readme && npm run copy:changelog && npm run copy:license

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