Add golangci-lint and configure GitHub actions #3

	name: tests

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	# Latest minor versions of Go 1.21 and 1.22
	go-version: ["1.21.x", "1.22.x"]
	include:
	# only update test coverage stats with Go 1.22
	- go-version: "1.22.x"
	update-coverage: true

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Setup Go ${{ matrix.go-version }}
	uses: actions/setup-go@v5
	with:
	go-version: ${{ matrix.go-version }}

	- name: Run Go tests with coverage
	run: make test-coverage

	- name: Upload coverage reports to Codecov
	uses: codecov/[email protected]
	if: ${{ matrix.update-coverage }}

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