Add go 1.21 to test matrix #10

	name: Go

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

	jobs:
	test:
	strategy:
	matrix:
	go-version: ['1.16', '1.18', '1.19', '1.21']
	# os: [ubuntu-latest, macos-latest, windows-latest]
	runs-on: ubuntu-latest
	# runs-on: ${{ matrix.os }}
	steps:
	- uses: actions/checkout@master
	- uses: actions/setup-go@v2
	with:
	go-version: ${{ matrix.go-version }}
	- name: Build project
	run: go build -v .
	- name: Run tests
	run: go test -race -coverprofile=coverage.txt -covermode=atomic
	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v3
	with:
	files: ./coverage.txt
	gcov_ignore: ./countries.go

	golangci:
	name: golangci-lint
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@master
	- name: Run golangci-lint
	uses: golangci/golangci-lint-action@v2

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