Update ocaml/setup-ocaml to v3 #2302

	name: Build

	on:
	- push
	- pull_request

	jobs:
	build:
	strategy:
	fail-fast: false
	matrix:
	os:
	- ubuntu-latest
	- macos-latest
	- windows-latest
	ocaml-compiler:
	- 4
	- 5
	include:
	- os: ubuntu-latest
	# We don't need to run lower bound test for more than one build
	ocaml-compiler: "4.02"
	- os: ubuntu-latest
	ocaml-compiler: 5
	# We don't need to compute coverage for more than one build
	send-coverage: true
	# Mdx tests Mdx tests
	run-mdx: true

	runs-on: ${{ matrix.os }}

	steps:
	- name: Set git to use LF
	if: runner.os == 'Windows'
	run: \|
	git config --global core.autocrlf false
	git config --global core.eol lf

	- name: Checkout tree
	uses: actions/checkout@v4

	- name: Setup OCaml ${{ matrix.ocaml-compiler }}
	uses: ocaml/setup-ocaml@v3
	with:
	ocaml-compiler: ${{ matrix.ocaml-compiler }}
	# Do not pin odoc to not break Mdx installation
	opam-pin: ${{ matrix.run-mdx != true }}

	- name: Install dependencies
	run: opam install --deps-only --with-test odoc odoc-parser

	- name: dune runtest
	run: opam exec -- dune runtest

	- name: Mdx tests
	if: matrix.run-mdx == true
	run: \|
	opam install mdx
	opam exec -- dune build @runmdx

	- name: Send coverage stats to Coveralls
	if: matrix.send-coverage == true
	run: \|
	opam install bisect_ppx
	mkdir -p $BISECT_FILE
	opam exec -- dune runtest --instrument-with bisect_ppx --force
	opam exec -- bisect-ppx-report send-to Coveralls --coverage-path /tmp/coverage
	env:
	BISECT_FILE: /tmp/coverage/bisect
	COVERALLS_REPO_TOKEN: ${{ github.token }}
	PULL_REQUEST_NUMBER: ${{ github.event.number }}

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