Upgrade fmt-maven-plugin 2.20 -> 2.21.1 #1004

	# Analyzes the code base using SonarCloud. See
	# https://sonarcloud.io/project/overview?id=PicnicSupermarket_error-prone-support.
	name: SonarCloud analysis
	on:
	pull_request:
	push:
	branches: [ master ]
	schedule:
	- cron: '0 4 * * 1'
	permissions:
	contents: read
	jobs:
	analyze:
	permissions:
	contents: read
	runs-on: ubuntu-22.04
	steps:
	- name: Check out code
	uses: actions/checkout@8ade135a41bc03ea155e62e844d188df1ea18608 # v4.1.0
	with:
	fetch-depth: 0
	persist-credentials: false
	- name: Set up JDK
	uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3.13.0
	with:
	java-version: 17.0.7
	distribution: temurin
	cache: maven
	- name: Create missing `test` directory
	# XXX: Drop this step in favour of actually having a test.
	run: mkdir refaster-compiler/src/test
	- name: Perform SonarCloud analysis
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
	run: mvn -T1C jacoco:prepare-agent verify jacoco:report sonar:sonar -Dverification.skip -Dsonar.projectKey=PicnicSupermarket_error-prone-support

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