Update checkout to v4 #90

	name: CI
	on: [push, pull_request]

	jobs:
	test:
	if: "!contains(github.event.head_commit.message, '[skip ci]')"
	name: Dub Test
	strategy:
	fail-fast: false
	matrix:
	os:
	- ubuntu-22.04
	- ubuntu-20.04
	- windows-2022
	#- macos-10.15
	dc:
	- dmd-2.108.1
	- dmd-2.102.1
	- ldc-1.38.0
	- ldc-1.31.0
	arch:
	- x86_64
	clang:
	- 12.0.0
	runs-on: ${{ matrix.os }}
	steps:
	- uses: actions/checkout@v4

	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3
	bundler-cache: true
	# Ruby puts this on the path which breaks ldc
	- name: Rename msys64/link.exe
	if: startsWith(matrix.os,'windows')
	shell: pwsh
	run: mv C:\msys64\usr\bin\link.exe C:\msys64\usr\bin\msys-link.exe

	- name: Cache
	id: cache
	uses: actions/cache@v3
	with:
	path: \|
	~/llvm
	key: cache-os:${{ matrix.os }}-clang:${{ matrix.clang }}

	- name: Setup D
	uses: dlang-community/setup-dlang@v1.3.0
	with:
	compiler: ${{ matrix.dc }}

	- name: Setup C++
	uses: aminya/setup-cpp@v1
	with:
	llvm: ${{ matrix.clang }}

	- name: Run tests
	continue-on-error: ${{ contains(matrix.os, 'macos') }}
	run: dub test -q --build=unittest-cov --arch=${{ matrix.arch }}
	env:
	LIBRARY_PATH: "${{ env.LLVM_PATH }}/lib"

	- name: Build binary
	run: dub build -q --arch=${{ matrix.arch }}
	env:
	LIBRARY_PATH: "${{ env.LLVM_PATH }}/lib"

	- uses: codecov/codecov-action@v3.1.4

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