Update actions/checkout action to v4 #186

	on: [push, pull_request]
	name: Test
	jobs:
	test:
	strategy:
	matrix:
	go-version: ["1.17.x", "1.18.x", "1.19.x"]
	os: ["ubuntu-latest"]
	runs-on: ${{ matrix.os }}
	steps:
	- name: Install Go
	uses: actions/setup-go@v4
	with:
	go-version: ${{ matrix.go-version }}
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Run Tests
	run: go test -v -coverprofile=profile.cov ./...
	- name: Coveralls
	uses: shogo82148/actions-goveralls@v1
	with:
	path-to-profile: profile.cov
	flag-name: Go-${{ matrix.go }}
	parallel: true

	# notifies that all test jobs are finished.
	finish:
	needs: test
	runs-on: ubuntu-latest
	steps:
	- uses: shogo82148/actions-goveralls@v1
	with:
	parallel-finished: true

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