update to go1.21 #16

	name: CI

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]

	jobs:

	test:
	name: Test
	runs-on: ubuntu-latest

	strategy:
	matrix:
	go_version: [1.18]
	steps:

	- name: Set up Go 1.x
	uses: actions/setup-go@v2
	with:
	go-version: ${{ matrix.go_version }}

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

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

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