upgrade ruby to 3.1 #10

	name: Main CI

	on:
	push:
	branches:
	- '*'
	tags-ignore:
	- 'v..*'
	pull_request:
	types: [opened, synchronize, reopened]

	jobs:
	test:
	runs-on: ubuntu-latest
	timeout-minutes: 10
	env:
	GEM_VERSION: 0.0.0
	steps:
	- uses: actions/checkout@v1
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: 2.5
	- name: Install dependencies
	run: bundle install
	- name: Run tests
	run: bundle exec rake test
	- name: Build
	run: gem build mapotempo_rubocop.gemspec
	shell: bash
	- name: Post build
	run: ./.github/actions/post-build.sh
	shell: bash

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