bump Go vertion to 1.21 #133

	name: onlytest
	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- '**'
	paths:
	- '**.go'
	- 'go.mod'
	- 'go.sum'

	jobs:
	test:
	name: Test
	runs-on: ubuntu-latest
	steps:
	- name: Set up Go 1.21
	uses: actions/setup-go@v3
	with:
	go-version: 1.21

	- name: Check out code into the Go module directory
	uses: actions/checkout@v2

	- name: Get dependencies
	run: go install

	- name: Test code
	run: go test -race -coverprofile="coverage.txt" -covermode=atomic github.com/michimani/go-esa/... -shuffle=on

	- name: Upload code coverage to Codecov
	uses: codecov/codecov-action@v2

Provide feedback