Switch ubuntu-latest to ubuntu-22.04 #15

	name: Build

	on:
	pull_request:
	paths:
	- '.github/workflows/build.yml'
	- 'src/**'
	- 'gradle/**'
	- 'gradlew'
	- 'gradlew.bat'
	- '*.gradle.kts'

	push:
	branches:
	- master

	workflow_dispatch:
	inputs:
	publish:
	description: \|-
	Publish to GitHub Packages
	(The master branch always publish regardless this option.)
	type: boolean
	required: true
	default: false

	concurrency:
	group: ${{ github.workflow }}

	jobs:
	build:
	name: Build library
	runs-on: ubuntu-22.04
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Setup JDK8
	uses: actions/setup-java@v4
	with:
	distribution: 'zulu'
	java-version: '8'
	cache: gradle
	- name: Validate Gradle wrapper
	uses: gradle/actions/wrapper-validation@v3
	- name: Add permission to Gradle wrapper
	run: chmod +x gradlew
	- name: Do build
	run: ./gradlew build
	- name: Upload artifact
	uses: actions/upload-artifact@v4
	with:
	path: ./build/libs/*
	retention-days: 30
	- name: Publish to GitHub Packages
	if: ${{ github.ref == 'refs/heads/master' \|\| inputs.publish }}
	run: ./gradlew publish
	env:
	GPR_KEY: ${{ secrets.GITHUB_TOKEN }}
	SIGNING_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
	SIGNING_KEY_ID: ${{ secrets.GPG_KEY_ID }}
	SIGNING_KEY_PASSWORD: ${{ secrets.GPG_PASSPHRASE }}

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