Use Java 21 #765

	name: CI

	on:
	push:
	tags:
	- '*'
	pull_request:
	workflow_dispatch:

	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3

	- uses: actions/setup-java@v3
	with:
	java-version: '21'
	distribution: 'temurin'

	- name: Gradle Wrapper Validation
	uses: gradle/wrapper-validation-action@v1

	- name: Copy CI gradle.properties
	run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties

	- name: Gradle Build Action
	uses: gradle/gradle-build-action@v2
	with:
	cache-read-only: ${{ github.ref != 'refs/heads/main' && github.ref != 'refs/heads/develop' }}

	- name: ktlint
	run: ./gradlew clean ktlintCheck

	- name: Regular lint
	run: ./gradlew app:lintGreenDebug

	- name: Test
	run: ./gradlew app:testGreenDebugUnitTest

	- name: Build
	run: ./gradlew app:buildGreenDebug

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