Fix serialize method for Rails 7.1.2 compatibility #59

	name: CI
	on:
	pull_request:
	paths-ignore:
	- 'README.md'
	push:
	paths-ignore:
	- 'README.md'
	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	ruby_version: ['3.0', '3.1', '3.2']
	rails_version: ['6.1', '7.0', '7.1']
	exclude:
	- ruby_version: 3.1
	rails_version: 6.1
	- ruby_version: 3.2
	rails_version: 6.1
	services:
	db:
	image: postgres:16
	ports: ["5432:5432"]
	env:
	POSTGRES_USER: postgres
	POSTGRES_PASSWORD: postgres
	options: >-
	--health-cmd pg_isready
	--health-interval 10s
	--health-timeout 5s
	--health-retries 5
	steps:
	- uses: actions/checkout@v1
	- name: Setup Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby_version }}
	- name: Build and run test
	env:
	DATABASE_URL: postgres://postgres:@localhost:5432/test
	POSTGRES_USER: postgres
	POSTGRES_PASSWORD: postgres
	run: \|
	sudo apt-get -yqq install libpq-dev
	bundle
	bundle exec appraisal rails_${{ matrix.rails_version }} bundle
	bundle exec appraisal rails_${{ matrix.rails_version }} rake

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