Upgrade Minitest to version 5.22.x (Drop Ruby 2.4 and 2.5 from CI) #403

	# .github/workflows/main.yml

	name: CI
	on: [push, pull_request]

	jobs:
	test-ruby-2-4-x:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Setup Ruby 2.4
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: 2.4
	- name: Build and run tests
	env:
	BUNDLE_GEMFILE: "Gemfile-Ruby-2-4"
	run: \|
	gem install bundler -v 2.3
	bundle install --jobs 4 --retry 3
	bundle exec rake

	test-ruby-2-5-x:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Setup Ruby 2.5
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: 2.5
	- name: Build and run tests
	env:
	BUNDLE_GEMFILE: "Gemfile-Ruby-2-5"
	run: \|
	gem install bundler -v 2.3.26
	bundle install --jobs 4 --retry 3
	bundle exec rake

	test-ruby:
	runs-on: ${{ matrix.os }}-latest
	strategy:
	matrix:
	os: [ubuntu]
	ruby-version: ["2.6", "2.7", "3.0", "3.1", "3.2"]
	steps:
	- uses: actions/checkout@v2
	- name: Setup Ruby ${{ matrix.ruby-version }}
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby-version }}
	bundler-cache: true
	- name: Build and run tests
	run: \|
	gem install bundler -v 2.4.6
	bundle install --jobs 4 --retry 3
	bundle exec rake

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