chore: make channel optional on `UploadFileV2` #719

	name: Test

	on:
	push:
	branches:
	- master
	pull_request:

	jobs:
	test:
	runs-on: ubuntu-22.04
	strategy:
	matrix:
	go:
	- '1.18'
	- '1.19'
	- '1.20'
	name: test go-${{ matrix.go }}
	steps:
	- uses: actions/checkout@v3
	- uses: actions/setup-go@v3
	with:
	go-version: ${{ matrix.go }}
	- name: run test
	run: go test -v -race ./...
	env:
	GO111MODULE: on
	lint:
	runs-on: ubuntu-22.04
	name: lint
	steps:
	- uses: actions/setup-go@v4
	with:
	go-version: '1.20'
	cache: false
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0
	- name: golangci-lint
	uses: golangci/golangci-lint-action@08e2f20817b15149a52b5b3ebe7de50aff2ba8c5 # v3.4.0
	with:
	version: v1.52.2

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