Build

Add singleton support for ease of use #3

	name: Build
	on:
	- push
	- pull_request
	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	if: (github.event_name == 'push' && github.ref == 'refs/heads/main') \|\| github.event_name == 'pull_request'
	steps:
	- name: Install Go
	uses: actions/setup-go@v4
	with:
	go-version: stable
	- name: Git checkout
	uses: actions/checkout@v3
	- name: Build
	uses: goreleaser/goreleaser-action@v2
	with:
	version: latest
	args: release --clean --snapshot
	- name: Test
	run: go test -race -coverprofile=coverage.txt -covermode=atomic ./...
	- name: Upload coverage
	uses: codecov/codecov-action@v3
	build_1_18:
	name: Build with Go 1.18
	runs-on: ubuntu-latest
	if: (github.event_name == 'push' && github.ref == 'refs/heads/main') \|\| github.event_name == 'pull_request'
	steps:
	- name: Install Go
	uses: actions/setup-go@v4
	with:
	go-version: '1.18'
	- name: Git checkout
	uses: actions/checkout@v3
	- name: Build and test
	run: \|
	go get ./...
	go test -race ./...

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