upgrade go version to 1.20 #26

	name: CI

	on:
	push:
	branches:
	- "**"
	tags:
	- "v*"

	permissions:
	contents: read

	jobs:
	test:
	name: Test
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 2
	- name: Setup
	uses: actions/setup-go@v4
	with:
	go-version: 1.20
	- name: Build
	run: go build -v ./...
	- name: Fmt
	run: test -z $(gofmt -l .)
	- name: Vet
	run: go vet ./...
	- name: Test
	run: go test -v -race -coverprofile=coverage.txt -covermode=atomic ./...
	- name: Codecov
	uses: codecov/codecov-action@v3

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