Update linting to golangci-lint #10

	name: Main

	on:
	push:
	branches:
	- master
	pull_request:
	workflow_dispatch:

	jobs:

	ci:
	name: ci
	runs-on: ubuntu-latest
	env:
	GO_VERSION: "1.20"
	GOLANGCI_LINT_VERSION: v1.52.2
	CGO_ENABLED: 0

	steps:

	- name: Set up Go ${{ env.GO_VERSION }}
	uses: actions/setup-go@v4
	with:
	go-version: ${{ env.GO_VERSION }}

	- name: Check out code
	uses: actions/checkout@v3
	with:
	fetch-depth: 0

	- name: Cache Go modules
	uses: actions/cache@v3
	with:
	path: ~/go/pkg/mod
	key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
	restore-keys: \|
	${{ runner.os }}-go-

	- name: Check and get dependencies
	run: \|
	go mod tidy
	git diff --exit-code go.mod
	git diff --exit-code go.sum

	- name: Install golangci-lint ${{ env.GOLANGCI_LINT_VERSION }}
	run: \|
	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh \| sh -s -- -b $(go env GOPATH)/bin ${GOLANGCI_LINT_VERSION}
	golangci-lint --version

	- name: Lint
	run: golangci-lint run

	- name: Test
	run: go test -v -cover ./...

	- name: Build
	run: go build -ldflags "-s -w" -trimpath -o pigeon .

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