Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows #1

	name: build

	on: [push, pull_request]

	jobs:
	build:
	strategy:
	matrix:
	os: [ubuntu-latest]
	go-version: [1.13.x, 1.14.x, 1.15.x, 1.16.x]
	runs-on: ${{ matrix.os }}
	services:
	redis:
	image: redis
	ports:
	- 6379:6379
	steps:
	- uses: actions/checkout@v2

	- name: Set up Go
	uses: actions/setup-go@v2
	with:
	go-version: ${{ matrix.go-version }}

	- name: Build
	run: go build -v ./...

	- name: Test
	run: go test -race -v -coverprofile=coverage.txt -covermode=atomic ./...

	- name: Benchmark Test
	run: go test -run=^$ -bench=. -loglevel=debug ./...

	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v1

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