feat(updater): add `Builder::header` and `Builder::headers` #40

	# Copyright 2019-2023 Tauri Programme within The Commons Conservancy
	# SPDX-License-Identifier: Apache-2.0
	# SPDX-License-Identifier: MIT

	name: check change files

	on:
	pull_request:
	paths:
	- '.changes/*.md'

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	check:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: check change files end with .md
	run: \|
	for file in .changes/*
	do
	if [[ ! "$file" =~ \.(md\|json)$ ]]; then
	echo ".changes directory should only contain files that end with .md"
	echo "found an invalid file in .changes directory:"
	echo "$file"
	exit 1
	fi
	done

	- uses: dorny/paths-filter@v3
	id: filter
	with:
	list-files: shell
	filters: \|
	changes:
	- added\|modified: '.changes/*.md'

	- name: check
	run: node ./.scripts/ci/check-change-files.js ${{ steps.filter.outputs.changes_files }}
	if: ${{ steps.filter.outputs.changes == 'true' }}

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