lib/io: removed, this package has been merged into lib/os #717

	name: Go1.20
	on: [push]
	jobs:

	build:
	name: Build
	runs-on: ubuntu-latest
	steps:

	- name: Set up Go 1.20
	uses: actions/setup-go@v4
	with:
	go-version: '^1.20.8'
	id: go

	- name: Check out code into the Go module directory
	uses: actions/checkout@v3

	- name: Build
	run: make build

	- name: Test
	run: make test

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