Bump actions/cache from 1 to 4 #22

	name: CI
	on:
	pull_request:
	branches:
	- master
	push:
	branches:
	- master
	tags: '*'
	jobs:
	test:
	name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	version:
	# - '1.0'
	- '1'
	- 'nightly'
	os:
	- ubuntu-latest
	arch:
	- x64
	steps:
	- uses: actions/checkout@v2
	- uses: julia-actions/setup-julia@v1
	with:
	version: ${{ matrix.version }}
	arch: ${{ matrix.arch }}
	- uses: actions/cache@v4
	env:
	cache-name: cache-artifacts
	with:
	path: ~/.julia/artifacts
	key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
	restore-keys: \|
	${{ runner.os }}-test-${{ env.cache-name }}-
	${{ runner.os }}-test-
	${{ runner.os }}-
	- uses: julia-actions/julia-buildpkg@v1
	- uses: julia-actions/julia-runtest@v1
	- uses: julia-actions/julia-processcoverage@v1
	- uses: codecov/codecov-action@v1
	with:
	file: lcov.info
	fail_ci_if_error: true
	token: ${{ secrets.CODECOV_TOKEN }}
	# docs:
	# name: Documentation
	# runs-on: ubuntu-latest
	# steps:
	# - uses: actions/checkout@v2
	# - uses: julia-actions/setup-julia@v1
	# with:
	# version: '1'
	# - run: \|
	# julia --project=docs -e '
	# using Pkg
	# Pkg.develop(PackageSpec(path=pwd()))
	# Pkg.instantiate()'
	# - run: \|
	# julia --project=docs -e '
	# using Documenter: doctest
	# using Cointegration
	# doctest(Cointegration)' # change Cointegration to the name of your package
	# - run: julia --project=docs docs/make.jl
	# env:
	# GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	# DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}

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