Fix a NPE, move common mixins down to platforms for now #43

	name: Validate

	on: [push, pull_request]

	jobs:
	validate:
	name: Validate License
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	with:
	submodules: true
	- name: Set up JDK 17
	uses: actions/setup-java@v2
	with:
	distribution: 'zulu'
	java-version: '17'
	cache: 'gradle'
	- name: Grant execute permission for gradlew
	run: chmod +x gradlew
	- name: Build with Gradle
	uses: gradle/gradle-build-action@bd5760595778326ba7f1441bcf7e88b49de61a25 # v2.6.0
	with:
	arguments: checkLicenses
	build:
	name: Build
	runs-on: ubuntu-20.04
	needs: validate
	steps:
	- uses: actions/checkout@v2
	with:
	submodules: true
	- name: Set up JDK 17
	uses: actions/setup-java@v2
	with:
	distribution: 'zulu'
	java-version: '17'
	cache: 'gradle'
	- name: Grant execute permission for gradlew
	run: chmod +x gradlew
	- name: Build Artifacts
	uses: gradle/gradle-build-action@bd5760595778326ba7f1441bcf7e88b49de61a25 # v2.6.0
	with:
	arguments: build
	- name: Publish to Maven
	uses: gradle/gradle-build-action@bd5760595778326ba7f1441bcf7e88b49de61a25 # v2.6.0
	with:
	arguments: publish
	env:
	NEXUS_USER: ${{ secrets.NEXUS_USER }}
	NEXUS_PW: ${{ secrets.NEXUS_PW }}

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