Added CONTRIBUTING.md file. #17

	name: CI

	on: [push]

	jobs:
	test-library:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	go-version: [ '1.19', '1.20', '1.21.x' ]

	steps:
	- uses: actions/checkout@v4

	- name: Setup Go
	uses: actions/setup-go@v4
	with:
	go-version: ${{ matrix.go-version }}

	- name: Install dependencies
	run: go get .

	- name: Go formatting analysis
	run: \|
	if [ -n "$(gofmt -l .)" ]; then
	gofmt -d .
	exit 1
	fi

	- name: Go code quality analysis
	run: go vet ./...

	- name: Go unit testing
	run: \|
	go test -race $(go list ./... \| grep -v /vendor/) -v -coverprofile=coverage.out
	go tool cover -func=coverage.out

	- name: Upload coverage results
	uses: actions/upload-artifact@v3
	with:
	name: coverage
	path: coverage.out

	test-lint:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- name: Setup Go
	uses: actions/setup-go@v4
	with:
	go-version: ${{ matrix.go-version }}

	- name: Install golangci-lint
	run: \|
	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh \| sh -s v1.52.2

	- name: Run golangci-lint
	run: ./bin/golangci-lint run -v

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