Use appraisal ~> 2.5 (#54) #19

	name: Release
	on:
	push:
	branches:
	- master
	jobs:
	check-release:
	container:
	image: ruby:3.1
	outputs:
	release: ${{ steps.check-release.outputs.release }}
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	with:
	fetch-depth: 2
	# See https://github.com/actions/runner-images/issues/6775.
	- name: Suppress 'detected dubious ownership' error.
	run: git config --global --add safe.directory ${GITHUB_WORKSPACE}
	- id: check-release
	name: Decide whether to release
	run: \|
	set +e
	git diff --exit-code --quiet HEAD~1 -- lib/jekyll-linkpreview/version.rb
	if [ $? = 1 ]; then
	echo release=true >> ${GITHUB_OUTPUT}
	else
	echo release=false >> ${GITHUB_OUTPUT}
	fi
	release:
	container:
	image: ruby:3.1
	if: needs.check-release.outputs.release == 'true'
	needs: check-release
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	# See https://github.com/actions/runner-images/issues/6775.
	- name: Suppress 'detected dubious ownership' error.
	run: git config --global --add safe.directory ${GITHUB_WORKSPACE}
	- env:
	RUBYGEMS_API_KEY: ${{ secrets.RUBYGEMS_API_KEY }}
	name: Set credentials for RubyGems
	run: \|
	mkdir ~/.gem
	echo :rubygems_api_key: ${RUBYGEMS_API_KEY} > ~/.gem/credentials
	chmod 0600 ~/.gem/credentials
	- name: Configure git
	run: \|
	git config --global user.email "[email protected]"
	git config --global user.name "Yusuke Nishioka"
	- name: Install dependencies
	run: bundle install
	- env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	name: Make a new release
	run: bundle exec rake release

Provide feedback