Preserve compatibility with go <= 1.17 #158

	name: CI

	on:
	push:
	branches: [master]
	pull_request:
	branches: [master]

	jobs:
	test:
	name: Build
	strategy:
	matrix:
	go-version: [1.12.x, 1.18.x, 1.19.x, 1.20.x, 1.21.x]
	platform: [ubuntu-20.04]
	runs-on: ${{ matrix.platform }}
	steps:
	- name: Install Go
	uses: actions/setup-go@v5
	with:
	go-version: ${{ matrix.go-version }}

	- name: Check out code into the Go module directory
	uses: actions/checkout@v4

	- name: Build
	run: make build

	- name: Test
	run: make test

	lint:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v4
	- uses: golangci/golangci-lint-action@v6.1.1
	with:
	version: v1.55

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