Bump actions/cache from 1 to 4 #542

	name: PR checks
	on:
	pull_request:
	jobs:
	test:
	name: Test using JDK ${{matrix.java}} and Scala ${{matrix.scala}}
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	java: [8, 11]
	scala:
	- 2.12.17
	- 2.12.18
	- 2.13.11
	- 2.13.12
	steps:
	- uses: actions/checkout@v2
	- uses: olafurpg/setup-scala@v14
	with:
	java-version: adopt@1.${{matrix.java}}
	- uses: actions/cache@v4
	with:
	path: ~/.ivy2/cache
	key: ivy-${{hashFiles('*/.sbt')}}-${{matrix.scala}}
	restore-keys: ivy-
	- uses: actions/cache@v4
	with:
	path: ~/.sbt
	key: sbt-${{hashFiles('*/.sbt')}}-${{hashFiles('project/build.properties')}}-${{matrix.scala}}
	restore-keys: sbt-
	- run: sbt ++${{matrix.scala}}! test
	additional-checks:
	name: Run additional checks
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: olafurpg/setup-scala@v14
	with:
	java-version: [email protected]
	- uses: actions/cache@v4
	with:
	path: ~/.ivy2/cache
	key: ivy-${{hashFiles('*/.sbt')}}
	restore-keys: ivy-
	- uses: actions/cache@v4
	with:
	path: ~/.sbt
	key: sbt-${{hashFiles('*/.sbt')}}-${{hashFiles('project/build.properties')}}
	restore-keys: sbt-
	- name: Generate coverage report
	run: sbt clean coverage test coverageReport
	- uses: codecov/codecov-action@v1
	- name: Run Scalafix check
	run: sbt fixCheck
	- name: Run Scapegoat
	run: \|
	sbt 'set version := "99.0-SNAPSHOT"; publishLocal'
	sbt -Dadd-scapegoat-plugin=true 'set name := "scapegoat-test"; set scapegoatVersion in ThisBuild := "99.0-SNAPSHOT"; scapegoat'

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