ci: test/build also for Go 1.20 and Go 1.21 #9

	name: building

	on:
	push:
	branches: ['develop']
	pull_request:
	branches: ['develop']

	jobs:
	build:
	strategy:
	fail-fast: true
	matrix:
	os: [ubuntu-latest]
	go: [
	'1.18',
	'1.19',
	'1.20',
	'1.21',
	]
	include:
	# Set the minimum Go patch version for the given Go minor
	- go: '1.18'
	GO_VERSION: '~1.18.0'
	- go: '1.19'
	GO_VERSION: '~1.19.0'
	- go: '1.20'
	GO_VERSION: '~1.20.0'
	- go: '1.21'
	GO_VERSION: '~1.21.0'
	runs-on: ${{ matrix.os }}

	steps:

	- name: Set up Go ${{ matrix.go }}
	uses: actions/setup-go@v3
	with:
	go-version: ${{ matrix.GO_VERSION }}
	check-latest: true

	- name: Print environment
	id: vars
	run: \|
	printf "Using Go at $(which go) (version $(go version))\n"
	printf "\n\nGo environment:\n\n"
	go env
	printf "\n\nSystem environment:\n\n"
	env

	- name: Check out the source code
	uses: actions/checkout@v3

	- name: Restore the Go modules cache
	uses: actions/cache@v3
	with:
	path: ~/go/pkg/mod
	key: go-${{ runner.os }}-${{ matrix.go }}-${{ hashFiles('go.mod') }}
	restore-keys: \|
	go-${{ runner.os }}-${{ matrix.go }}

	- name: Install Ragel 6.10
	run: sudo apt-get install -y ragel

	- name: Build the parser
	run: make

	- name: Ensure the parser code is updated
	run: git diff --exit-code

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