Bump the minimal version of `Dune` to `3.0` #30

	name: Build

	on:
	push:
	pull_request:

	permissions: {}

	env:
	OCAML_DEFAULT_VERSION: 4.08.1
	# Add OPAMYES=true to the environment, this is usefill to replace `-y` option
	# in any opam call
	OPAMYES: true

	jobs:
	build:
	strategy:
	fail-fast: false
	matrix:
	os:
	- macos-latest
	- ubuntu-latest
	ocaml-compiler:
	- 4.08.1
	- 5.0.0

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

	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	persist-credentials: true

	- name: Use OCaml ${{ matrix.ocaml-compiler }}
	uses: ocaml/setup-ocaml@v2
	with:
	allow-prerelease-opam: true
	ocaml-compiler: ${{ matrix.ocaml-compiler }}
	dune-cache: true

	- name: Install dependencies
	run: opam exec -- opam install -y . --locked --deps-only --with-test

	- name: Build ocplib-simplex with opam
	run: opam exec -- opam reinstall .

	- name: Run tests
	run: opam exec -- make test

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