Use Go 1.21 #24

	name: tests
	on:
	pull_request:
	paths:
	- '.github/workflows/go-tests.yml'
	- '**.go'
	jobs:
	lint:
	name: Lint checking on Ubuntu
	runs-on: ubuntu-latest

	steps:
	- name: Check out code into the Go module directory
	uses: actions/checkout@v4
	- name: Set up Go
	uses: actions/setup-go@v4
	id: go
	with:
	go-version: '1.21'
	cache: true
	- name: golangci-lint
	uses: golangci/golangci-lint-action@v3
	with:
	version: latest

	build:
	name: Test on ${{ matrix.os }} with ${{ matrix.go }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest]
	go: [1.21]

	steps:
	- name: Set up Go ${{ matrix.go }}
	uses: actions/setup-go@v4
	with:
	go-version: ${{ matrix.go }}
	cache: true
	id: go

	- name: Check out code into the Go module directory
	uses: actions/checkout@v4

	- name: Put a dummy js file for go:embed.
	run: \|
	mkdir -p dashboard/public/
	touch dashboard/public/bundle.js

	- name: Check whether a goptuna binary is successfully built.
	run: go build -o ./goptuna cmd/main.go

	test:
	name: Test on ${{ matrix.os }} with ${{ matrix.go }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macOS-latest]
	go: [1.21]

	steps:
	- name: Set up Go ${{ matrix.go }}
	uses: actions/setup-go@v4
	with:
	go-version: ${{ matrix.go }}
	cache: true
	id: go

	- name: Check out code into the Go module directory
	uses: actions/checkout@v4

	- name: Running go tests
	run: make test

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