add dependabot config, ci job and general cleanup #1

	name: Use Action

	on:
	pull_request:

	jobs:
	use-action:
	name: Use Action

	strategy:
	matrix:
	platform:
	- ubuntu-latest
	- macos-latest

	runs-on: ${{ matrix.platform }}

	steps:
	- uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 # v4.0.1
	with:
	go-version: '1.20'
	check-latest: 'true'

	- uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3

	# Minimal publish
	- uses: ./

	- run: ko publish --bare ./
	if: ${{ github.event_name == 'pull_request' }}
	env:
	KO_DOCKER_REPO: ko.local

	- name: Install old release
	uses: ./
	with:
	version: v0.8.0

	- name: Check installed version
	run: ko version \| grep 0.8.0

	- name: Install from tip
	uses: ./
	with:
	version: tip

	- name: Check installed version (tip)
	run: \|
	sudo rm /usr/local/bin/ko # Uninstall previous versions.
	ko version

	# If KO_DOCKER_REPO is set during setup, it's set for future steps.
	- name: Pre-set KO_DOCKER_REPO
	uses: ./
	env:
	KO_DOCKER_REPO: already-set

	- name: Check pre-set KO_DOCKER_REPO
	run: \|
	if [[ "${KO_DOCKER_REPO}" != "already-set" ]]; then
	echo "${KO_DOCKER_REPO} != already-set"
	exit 1
	fi

Provide feedback