fix(opam): set minimum bound for OCaml #13

	name: Build, test, and check

	on:
	pull_request:
	push:
	branches:
	- main

	jobs:
	build:
	strategy:
	matrix:
	os:
	- ubuntu-latest
	ocaml-compiler:
	- 4.14.x
	- 5.1.x
	runs-on: ${{ matrix.os }}
	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Use OCaml ${{ matrix.ocaml-compiler }}
	uses: ocaml/setup-ocaml@v2
	with:
	ocaml-compiler: ${{ matrix.ocaml-compiler }}

	- name: Install OPAM dependencies
	run: opam install . --deps-only --with-test

	- name: Build
	run: opam exec -- dune build

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

	publish-docs:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Use OCaml 4.14.x
	uses: ocaml/setup-ocaml@v2
	with:
	ocaml-compiler: 4.14.x
	dune-cache: true

	- name: Install OPAM dependencies
	run: opam install . --deps-only --with-doc

	- name: Build docs
	run: opam exec -- dune build @doc

	- name: Upload docs
	uses: actions/upload-artifact@v2
	with:
	name: html-docs
	path: _build/default/_doc/_html/

	check-changes:
	runs-on: ubuntu-latest
	if: github.event_name == 'pull_request'
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Determine if CHANGES changed
	id: changes-changed
	uses: tj-actions/changed-files@v39
	with:
	files_yaml: \|
	changes:
	- 'CHANGES'

	- name: Fail if CHANGES did not change
	if: steps.changes-changed.outputs.changes_any_changed == 'false'
	run: \|
	echo "No changes made to the CHANGES file."
	echo "Please update the file with your changes."
	exit 1

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