Bump rubocop from 1.63.5 to 1.64.0 #217

	---
	name: Diff PR output
	on:
	pull_request:

	jobs:
	diff:
	name: Diff PR output
	runs-on: ubuntu-latest
	steps:
	- name: Install libbeebimage
	run: \|
	wget -qO- \
	https://github.com/ribbons/libbeebimage/archive/v1.0.tar.gz \|\
	tar -xzC ..
	cmake -S ../libbeebimage-1.0 -B ../build -DCMAKE_BUILD_TYPE=Release
	cmake --build ../build && sudo cmake --install ../build

	- name: Checkout base
	uses: actions/checkout@v4
	with:
	ref: ${{ github.base_ref }}

	- name: Ruby and bundle
	uses: ruby/setup-ruby@v1
	with:
	bundler-cache: true

	- name: Build base
	run: \|
	bundle exec rake compile
	JEKYLL_ENV=production bundle exec jekyll build -d ../base/
	git clean -ffdx -e .bundle -e vendor && git reset --hard HEAD

	- name: Checkout PR
	uses: actions/checkout@v4
	with:
	clean: false

	- name: Update dependencies and build PR
	run: \|
	bundle install
	bundle exec rake compile
	JEKYLL_ENV=production bundle exec jekyll build -d ../head/

	- name: Generate diff
	run: \|
	cd ..
	diff -rN --unified=1 base/ head/ > "$OLDPWD/diffresult" \|\| true
	echo ${{ github.event.number }} > "$OLDPWD/pr_number"

	- name: Upload data
	uses: actions/upload-artifact@v4
	with:
	name: data
	path: \|
	diffresult
	pr_number

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