CI: add Go 1.21 #62

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

	name: Go
	jobs:

	test:
	strategy:
	matrix:
	go-version: [1.14.x, 1.19.x, 1.20.x, 1.21.x]
	platform: [ubuntu-latest, macos-latest, windows-latest]
	runs-on: ${{ matrix.platform }}
	steps:
	- name: Install Go
	uses: actions/setup-go@v4
	with:
	go-version: ${{ matrix.go-version }}
	- name: Checkout code
	uses: actions/checkout@v3
	- name: Download Go dependencies
	env:
	GOPROXY: "https://proxy.golang.org"
	run: go mod download
	- name: Test with -race
	run: go test -race -count=1 ./...
	- name: Integration test
	if: matrix.platform == 'ubuntu-latest' && startsWith(matrix.go-version, '1.21')
	run: \|
	sudo modprobe nfnetlink_queue
	sudo ip6tables -I OUTPUT -p ipv6-icmp -j NFQUEUE --queue-num 100
	sudo iptables -I OUTPUT -p icmp -j NFQUEUE --queue-num 100
	go test -v -tags integration -exec=sudo -count=1 ./...
	- name: staticcheck.io
	if: matrix.platform == 'ubuntu-latest' && startsWith(matrix.go-version, '1.19')
	uses: dominikh/[email protected]
	with:
	version: "2022.1.3"
	min-go-version: "1.17"
	install-go: false
	cache-key: ${{ matrix.go-version }}

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