Update to go 1.21. #33

	# Run on any tag
	on:
	push:
	tags: ['*']

	name: Release a tag

	jobs:
	test:
	strategy:
	matrix:
	go-version: [1.12.x, 1.13.x, 1.14.x, 1.15.x, 1.16.x]
	os: [ubuntu-latest, macos-latest, windows-latest]
	runs-on: ${{ matrix.os }}
	steps:
	- name: Install Go
	uses: actions/setup-go@v1
	with:
	go-version: ${{ matrix.go-version }}
	- name: Checkout code
	uses: actions/checkout@v2
	- name: Test
	run: go test ./...
	- name: Generate coverage report
	run: ./.github/workflows/codecov.sh
	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v1
	lint:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v2
	- name: Run linter
	uses: golangci/golangci-lint-action@v2
	with:
	version: v1.28
	goreleaser:
	runs-on: ubuntu-latest
	steps:
	- name: Install Go
	uses: actions/setup-go@v1
	with:
	go-version: 1.16.x
	- name: Checkout code
	uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: Run GoReleaser
	uses: goreleaser/goreleaser-action@v1
	with:
	version: latest
	args: release --rm-dist
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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